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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 77301. |
19. The ages of Leena and Heena are in the ratio 7:5. Ten years later, the ratio of their ages will be 9:7.Find their present ages. |
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Answer» Let Leena's age be x and Heena's age be y. x/y = 7/5 5x = 7y 5x - 7y = 0 . . . . . (1) (x + 10)/(y + 10) = 9/7 7x + 70 = 9y + 90 7x - 9y = 20 . . . . . (2) (1) × 7 35x - 49y = 0 . . . . . (3) (2) × 5 35x - 45y = 100 . . . . . (4) (3) - (4) -4y = -100 y = 25 5x = 7 × 25 x = 35 Leena is 35 years and Heena is 25 years |
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| 77302. |
The age of father is 5 times that of his son3 years ago, the age of father was 8 timethat of his son. Find the present agefather.(A) 42 years(B) 48 years(C) 40 years(D) 35 years |
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Answer» f=5s(f-3)=8(s-3)5s-3=8s-2421=3sso s=7 yearsso f=35 years |
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| 77303. |
43. Two years ago, a man was five times as old as his son Iwo yealsTAehis age will be 8 more than three times the age of his son. Find theirICBSE 2008present ages. |
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| 77304. |
5 years ago, father's age was 5 times asold as his son and after 3 years, he will be3 times as old as his son. Find the presentage of son(A) 10 years(B) 13 years(C) 12 years(D) of these |
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Answer» yes the answer was right |
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| 77305. |
. 5 years ago a man was 7 times as old as his son. After 5 years he will be thrice as old ashis son. Find their present ages |
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| 77306. |
R is the set of real numbers and Q is the set of rational numbers, then what isR - Q? |
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| 77307. |
r/gs i 210 were divided among A, B, C so tnat"A : B Ď 5 : 4 and B : C's 9 :40. Then,gets |
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Answer» A:B=5:4A=5X, B=4X B:C=9:10B=9Y, C=10Y B=4X=9YX=9Y/4 A+B+C=1210 5X+4X+10Y=12109X+10Y=12109(9Y/4)+10Y=121081Y/4 +10Y=1210(81+40)Y=1210*4Y=4840/121Y=440/11=40 So C gets 10Y=10*40=400Rs |
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| 77308. |
Discuss Dedekind's theory of real numbers |
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| 77309. |
The area of a square field is 30-m2. Calculate thelength of the side of the square. |
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| 77310. |
6. In the figure, ABC is a right angled triangle rightangled at ZA. Find the area of the shaded regionif AB = 6 cm, BC = 10 cm and O is the centre ofthe incircle of the triangle ABC[Board Term-2, 2015] |
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| 77311. |
EXERCISE U.In Fig. 6.28, find the values of x and y and thenshow that AB IICD.50130Fig. 6.28 |
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| 77312. |
EXERCISE 7.2an isselcs triangle ABC, with AB AC, the bisectors of 2 B and C terseh odher at O Jom A to O. Show that :(u) AO bisects Z A |
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| 77313. |
Ifx-3z+4; yx 4 and z- 1.5, find the value of 2x + 3y-2z.(1) 33.5 (227.5 (3) 6.5 (4) 7.5 |
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Answer» thank you very much this is for my daughter's exercise |
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| 77314. |
ŕ¤ŕ¤ 51SZ P WP gye = X e g6 =W gk Pk g8 | |
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| 77315. |
Five years ago, Nuri was thrice as old as Sonu. Ten years later, Nuriwill be twice as old as Sonu. How old are Nuri and Sonu ? |
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| 77316. |
Rohit was 4 times as old as his son 8 yearsago. after years, Rohit will be twice as old ashis son. What are their present ages? |
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Answer» Let present age of Rohit=x years Let his sons present age=y years Therefore atq x-8=4[y-8] x-8=4y-32 x-4y=-32+8 x-4y=-24………….(1) Now 8 years hence their ages will be x+8=2[y+8] x+8=2y+16 x-2y=16–8 x-2y=8……………(2) Subtract (2) from (1) x-4y=-24 _x-2y = _8 -2y=-32 y=16 Substitute value of y in eq (1) x-4y=-24 x-4×16=-24 x-64 =-24 x=-24+64=40 .: x=40 Hence Rohits present age =40 years and his son's present age=16 years |
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| 77317. |
5.Anu is four years older than Sunil. Elght years ago, Anu was three times Sunil's agFind the ages of Sunil and Anu. |
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Answer» Anu=Sunil+3(Anu-8)=3(Sunil-8)Anu-8=3Sunil-24Sunil+3-8=3Sunil-24so 2Sunil=19so Sunil=9.5so Anu=12.5 |
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| 77318. |
7.Find the zero of the polynomial p(x) = cx + d, c0 , c and d are real numbers. |
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Answer» p(x)= 0 cx+d= 0 x=-(d/c) is the zero of the polynomial. |
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| 77319. |
p(x) =cx + d, c is not equal to 0 and c, d are real number. |
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Answer» Thnk u |
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| 77320. |
iietireeJust then two more friends joined them. Tney decthemselves.pizzas(a) If radius of each pizza is 7 cm, find the area of the share of pizza that each(b) What value of the children is depicted here?2. There was a deserted land near a colony where peopleused to throw garbage. Colony people united to developa pond in triangular shape as shown in figure. The landis in the shape of a parallelogram ABCD. In the restof the portion medicinal plants are grown. Area of theparallelogram is 200 m2Calculate the area where medicinal plants are grown(b) Which value is depicted here? |
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Answer» Area of a parallelogram = Base x altitude = 200 m² since PD is an altitude drawn to the base DC Hence area of the parallelogram = DC x PD = 200 Also the pond is a triangle shaped with DC as base and PD as altitude Hence area of the pond = 1/2 x Base x altitude = 1/2 x DC x PD = 1/2 x 200 = 100 Area of the medicinal plant = Area of the land - area of the pond = 200 - 100 = 100 m² Hence the area where the medicinal plants were grown is 100 m² |
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| 77321. |
Gs.In right angledcot A8ABC, Y is not a = 8. Find : sinas -Sine.sec B.IS |
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Answer» cot A = 8/15; (hypo)^2=( opp)^2 +(adj)^2 = (15)^2 + ( 8)^2 = 225 + 64 =289, ( hypo)=17; sinA=(15/17); cosA= (8/17); secA= ( 17/18) 15 cotA= 8cotA= 8/15cosec^2A= 1+cot^2A = 1+64/225... = 225+64/225= 289/225cosecA= √289/225= +-17/15sinA= 15/17 Sin A=15/17Sec A=17/8 correct answer issinA = 15/17SecA = 17/8 |
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| 77322. |
Jersthat q and so, then their product isCXProduct of th.GS_prSas+3= |
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Answer» 5/8 is the correct answer of the given question x= -5÷8 is the correct answer -7-(-4)/40=-7+4/40 -(-)=+=-3/40 (ans) |
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| 77323. |
dich is thereneu uEXERCISE 10.1w a quadrilateral in the Cartesian plane, whose verices are (-4,5), (0,75,-5) and (4, -2). Also, find its area. |
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| 77324. |
4 If x E W, find the solution set of 1 Also32z-Inumber line, if possible. |
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| 77325. |
2 36deN.(2001)Graph the solution set on the number line.If x e W, find the solution set of 31, 1. Also graph the sonumber line, if possible. |
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Answer» thanks |
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| 77326. |
After 32 years, Rahim will be 5 times as old as he was 8 years ago. How old is Rahim today? |
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| 77327. |
Vikas is three years older than Deepika. Six years ago, Vikas's age was tour timesDeepika's age. Find the ages of Deepika and Vikas. |
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Answer» Let deepika age be x yearsVikas age = x + 36 years ago:Deepika age = x - 6Vikas age = x+3-6 = x-3As per the question, vikas age is 4 times the deepika agex - 3 = 4(x-6)x-3 = 4x - 243x = 21x = 7Deepika age = 7 yrsVikas age = 7+3 = 10 thank you dear |
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| 77328. |
he ages of A and B are in the ratio 8: 3. Six years hence, their ages will be in the ratio 9: 4.A and B are in the ratio 8:3. Six years hence. their ages will be in the ratio 9:4.ges ofTheFind their present ages |
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Answer» Yes |
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| 77329. |
equalityax-b-p , then q(aa + b)-pcx+d qAny term of an equation can0 Linear equations are used in1. Solve:11x(a)= 224x +855x +8 62. The cost of 2 colour boxof a geometry box, find3. Three numbers are con |
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Answer» 1.a) 11x/2 = 22 11x = 44 x = 44/11 = 4 b) (4x + 8)/(5x + 8) = 5/6 6(4x + 8) = 5 ( 5x + 8) 24x + 48 = 25x + 40 25x - 24x = 48 - 40 x = 8 |
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| 77330. |
Example 19: Solve x2-2x+(-2+4i) 0Solution: Here D 2x-2 Discriminant-finding the square root of .3-4i is necesslet the square root be u+iv |
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Answer» you already have a solution then what is your question here |
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| 77331. |
depicted Dy24 i Find the square root of 1024 by division method.i) Find the least number which must be added to 252 to get a perfect square. Alsofind the square root of the perfect square so obtained.1100N- |
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Answer» Nearest perfect square is 256 So adding 4 makes 252 perfect square. Sqaure root of 256 is 16 |
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| 77332. |
(100)i0(5) (20)2.write the following numbers in the form of rational indices.(1) Square root of 5th power of 121.(3) 5th root of square of 264(2) Cube of 4th root of 324(4) Cube of cube root of 3Let's recall.4 x 4 = 16 implies 42 = 16, also (-4)2 = 16 which indicates 116 has two square roots ; one positive and the other negative.positive root of 16 is shown gs 116 and nenntirntnf |
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Answer» 2(i) √(121)^5 = 121^(5/2) (ii) (⁴√324)³ = (324)¾ iii). ((264)²)^(1/5)= (264)^(2/5) 6th root of cube of 5 |
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| 77333. |
It costs?936 to fence a square field at 7.80 per metre. Find the cost of levelling thefieldat2.50 per square mere. |
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Answer» 7 .80 is the cost of fencing 1 m936 is the cost of fencing 1/7.80×936=120mNow perimeter of square =4*side=120120 /4=side=30Now Area of field=side×side=30*30=900cm^2now cost will be2.50*9002250 rupees |
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| 77334. |
9. It costs8704 to fence a square field at the rate of8.50 per metre. Find the area of the field |
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| 77335. |
6 To fence a circular garden, the total cost is? 26,400 at the cost of50 per metre. Find the radius of thecircle |
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Answer» Total cost of fencing = Rs. 26,400cost of fencing = Rs.50 per meterTotal length of fence = 26,400/50 = 528m Thus perimeter of circular garden = 528 mIf the radius is R2πR = 528⇒R = 528/2π⇒R = (528×7)/(2×22)⇒R = 84m. |
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| 77336. |
Find the total amount if 120% of it is? 1080. |
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Answer» Suppose total amount is x 12% of x = 1080 12×x/100 = 1080 x = 90×100 = 9000 If you find this answer helpful then like it. Let the anount be x 12% of x = 1080 12/100 of x = 1080 x = 1080*100/12 x =9000 |
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| 77337. |
PN3. A wire is in the shape of a rectangle.\wire is rebent in the shape of a square, WAlso find which shape encloses more area?1ts length is 40 om and breadth i 22 em, 1 thehat will be the measure of each side |
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| 77338. |
Practice Set 4If Rihanna deposits 1500 rupeeschool fund at 9 p.c.p.a for 2 years, whatis the total amount she will get?in the. Jethalal took a housing loan of 2,50,00rupees from a bank at 10 p.c.p.a. for 5years. What is the yearly interest he mustpay and the total amount he returns to thebank? |
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Answer» please like my answer if you find it useful |
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| 77339. |
Mohit sold a watch to Karim at a gain of 10% and Karim sold it to Rahim at a gain of 4%. IfRahim pays 14300 for it, for how much did Mohit purchase it?18.19. If the maniufan |
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| 77340. |
8, Mohit sold a watch to Karim at a gain of 10% and Karim sold it to Rahim at a gain of 4%. IfRahim pays ? 14300 for it, for how much did Mohit purchase it?9. If the manuf |
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| 77341. |
A.Match the words and phrases with their meanings in the box belovwparagraph numbers1. homesick2. practically3. It pains me4. appreclate5. thoughtless6. exercise7. rellef8. ghastly(10)(13)(14)almost it hurts me terrible test the strength ofunderstanding the difficultles wanting to be homea welcome change not very caring |
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| 77342. |
Find the least number of four digits which is aperfect square. Also, find its square root. |
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Answer» So the least number to be added to 1000 is 24. Therefore, 1000+24 = 1024 is the smallest four digit number which is a perfect square. 1024 the correct answer of the given question 1024 is the correct answer least number of four digits which is a perfect square is 1024it's square root is 32 |
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| 77343. |
U mby 4.5 m. How many tiles willg the tiles at 131.40 per tileThe area of a rectangular park is 1560 m2 und its broadth is in the length and perimetthe park. Also, find the cost of fencing it at 2250 per metreFind the perimeter of a square whoof the park. Also, find the cork is 1560 mm and its |
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| 77344. |
14. Length of a rectangular blackboard is 8m more than its breadth. If its length is increased by 7 m and itsbreadth is decreased by 4 m, its area remains unchanged. What is the length of the blackboard? |
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Answer» Let the breadth of Reactangle blackboard = xThen length of Reactangle blackboard = x + 8 Area A1 = length*breadth = (x +8)*x If length increased by 7 m and breadth decreased by 4 m Area A2 = length*breadth = (x + 15)*(x-4) Given A1 = A2(x + 8)*x = (x + 15)(x - 4)x^2 + 8x = x^2 - 4x + 15x - 6011x - 8x = 603x = 60x = 60/3 = 20 Length of Reactangle blackboard = x + 8= 20 + 8 = 28 m
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| 77345. |
12. 50 chairs and 30 blackboards were purchased for a school. If each chair costseach blackboard costs * 1645, find the total amount of the bill.1065 and |
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Answer» the answer of the following is 102600₹ |
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| 77346. |
3. By selling a radio for528, Mohit gains 10%. Find his cost price.G+ 0/ |
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| 77347. |
By selling the chair for 990rs trader gains 10% find the cost price of a chair |
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| 77348. |
INANTlution :10 3linterchanging Ist and 2nd colum |
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Answer» Note :-Interchange two rows or columns changes the sign: -> -1 * det(A) Hence in the expression provided, determinant is multiplied by a factor -1 , when two of it's rows or columns are interchanged. |
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| 77349. |
Q81Select the most appropriate option to sthe equation.9.87+6.54 +3.21-(A) 19.62(B) 18.62(C) 19.72(D) 18.52tha most appropriate option. |
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Answer» 9.87 + 6.54 + 3.21 16.41 + 3.21 19.62 A) option is correct |
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| 77350. |
A wire is in the shape of a rectangle. Its length is 40 cm and breadth is 22 cm. If thesame wire is rebent in the shape of a square, what will be the measure of each side.6.Also find which shape encloses more area? |
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