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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.
| 68751. |
17. A and B can finish a work in 30 days. Thworked for it for 20 days and then B left. Theremaining work was done by A alone in 20 moredays. A alone can finish the work in |
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| 68752. |
' (था) 20 न 2:28, ८स+20 नर5% 22 न 2? £C =2 |
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Answer» C = 2B B + C = 75 A + B + C = 180 A + 75 = 180 A = 105 2B + B = 75 3B = 75 B = 25 C = 50 |
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| 68753. |
13. A alone can do a piece of work in 12 days and B alone can do the same work in15 days. A works alone for 4 days. In how many days will A and B together finishthe remaining work ? |
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| 68754. |
Example 4 After giving discount of 20% on mark up price, a trouser was soldfor Rs. 560. Determine mark up price of trouser. |
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Answer» Let the narked price of trouser =₹x x-(20/100)*x=560(80/100)*x=560x=(560/80)*100x=700 Therefore, the marked price of trouser=₹700 |
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| 68755. |
: tf α and β are the zeroes of the polynomial x?-5xk such that a-findflie duernei nf the polynomial 25 p-15 p+2, find a quadratic polynomia |
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Answer» Like if you find it useful |
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| 68756. |
H2 S,Os on complete hydrolysis gives x mole of H2So, and y mole of H,02. Find (xy |
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Answer» H2S2O8+ 2H2O → H2O2+ 2H2SO4 Hence X =2 and y =1hence X+y=2+1=3 |
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| 68757. |
। 6.(c) 10 days (d) 12 daysA can do a piece of work in 12days and B in 15 days. Howmany days will both take to-gether to complete the work?A एक काम को 12 दिनों में तथा B15 दिनों में कर सकता है। दोनोंमिलकर उस काम को कितने दिनों मेंपूरा करेंगे?1h8 dans |
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Answer» A alone can do the work in 12 days He can do = 1/12 work in one day B alone can do the work in 15 days He can do = 1/15 work in one day A and B together can do = 1/12 + 1/15 = (5+4)/60 = 9/60 work in 1 day. They need days to finish the work = 1/(9/60) = 60/9 days. |
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| 68758. |
iece of work in 25 days and Y can finish it in 20 days. They work together for 5 days andX can do a pthen Y leaves. In how many days will X finish the remaining work? |
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Answer» can you tell me the name of book |
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| 68759. |
5.Acan do a piece of work in 25 days, which Balone can finish in 20 days. Both together workfor 5 days and then A leaves off. How manydays will B take to finish remaining work? |
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Answer» A can do a piece of work in 25 days ⇒ A can do a work of W/25 in one day B can do a piece of work in 20 days ⇒ B can do a work of W/20 in one day given the both work 5 days 5 days work of both A and B is 5W/25 + 5W/20 = W/5 + W/4 = 9W/20 remaining work after A leaves is W - 9W/20 = 11W/20 11W/20 work is to be done B alone and B can do a work of W/20 in one day ⇒ B completes the remaining work in 11 days. |
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| 68760. |
Directions : Mark () against the correct answer:1. A does a work in 10 days and B does the same work in 15 days. In howthey together will do the same work ?(a) 5 days(b) 6 days(c) 8 days (d) |
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Answer» A=10 LCM. 30B=15effencA = 3B= 2totel work 30/5A+B=6 days |
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| 68761. |
The probability Harsha winning a watch is 3/5. Find the probability Harsha tossing the match. |
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Answer» probability that Harsha losing the match is 1-(3/5)= 2/5 |
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| 68762. |
If the probability of a horse A winning a raceis 1/4 and the probability of a horse B winningthe same race is 1/5, then the probability thateither of them will win the race isa)1b)22020 |
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Answer» The probability of winning if horse A=1/4And of horse B=1/5So, probability that either of them wins =1/4+1/5 =1/20 (option A) |
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| 68763. |
9. If the probability of winning agame is 0.3, what is the probabilityof loosing it? |
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| 68764. |
To express the recurring decimal in qform.Ex. (1) Express the recSolution:press the recurring decimal 0.777...Let x= 0.777 = 0.7,', 10x7.777 = 7.77707 |
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| 68765. |
nf |
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| 68766. |
2. Show that any positive odd integer is of the form 6q +1 or6q +3 or 6q 5, where g is some integer.Sol. Let a be any nositivo |
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| 68767. |
nlu nf k ?k k t 10 and 3k + 2 are in A.P.? |
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Answer» Let a1= 2k, a2= k+10, a3= 3k+2 are in AP, then Second term - first term = third term - second term K+10 -(2k) = 3k+2-(k+10) K+10-2k =3k+2-k-10 k -2k +10 = 3k-k +2-10 -k +10= 2k -8 -k-2k= -8-10 -3k = -18 k =18/3= 6 k= 6 Like my answer if you find it useful! |
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| 68768. |
25. In an AP, the first term is-4, last term is29 and the sum of all its terms is 150. FindIcesE 20101its common difference |
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| 68769. |
13. If(x+a) is a factor of (z? + 2ax + 5x + 10), find the value of a. IceSE 201123..-1and b =2 |
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Answer» Let f(x) = 2x^2 + 2ax + 5x + 10If (x+a) is a factor then by the factor theorem f(-a)=0f(-a) = 2a^2 - 2a^2 - 5a +10 = 0-5a + 10 = 0a = 2 |
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| 68770. |
ull?3. A can do a piece of work in 25 days and B can do the same work in 30 days. They work together 5 days.How much work is still left? |
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| 68771. |
IINTER PHYSICs111 WORK, ENERGY AND POWERLONG ANSWER TYPE QUESTIONSDevelop the notions of work and kinetic energy and show that it leadsto work-energy theorem.Work (W): Work done by the force is defined as the product of[March 2017AP, 2014] |
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Answer» 1 2 3 |
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A can do a piece of work in 10 days and B can do the same work in 12 days.How long will they take to finish the work, if both work together? |
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Answer» i think 6 days........ yes 6 days they can do the work by doing it together take lcm of 10,12,15and simplify |
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| 68773. |
Sum of the first n terms of an A.P. having first term a and last term E isA) 72a-t) B 72a+e) C)a+ D) a-t)iS.. |
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Answer» sum of first n terms is given by n/2*(a+l) |
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Three males A, B, C tossing a coin one by one, Who get tail first he will win. If A has firstchance then what is the probability fo winning of A? |
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Answer» As there will be two eventstail or headso getting a tail in first will be 1/2so probability will be 1/2 too thnks but the given answer is 4/7 ,2/7 and 1/7 |
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| 68775. |
α and β are the zeros of the polynomial f(x)-x2 + px + q, form a polynomial whosezeros are (α+ β)2 and (α-β)2 |
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| 68776. |
Since, log, e1By Calculator : x-2.7725...Ans.ofEx. 1.3.2Determine the value of the following logarithms(i) log, 9Soln.:Ex 1SolhSolndsaLet, log, 9-1Write logarithm in exponential from, |
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Answer» Let it be x then 3^x = 9. Therefore x=2. Thanks |
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| 68777. |
12. Find the quadratic polynomial, sum of whose zeros is 8 and theirproduct is 12. Hence, find the zeros of the polynomial. IceSE 200 |
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| 68778. |
i Dovo: 7 I < Ze—" W”M‘J.M’mfiw&wfiMfiw B00ponctlingdhe APB_iy Fom (=2 |
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Answer» Area of the segment = Area of the sector - Area of the triangleArea of the sector =θ/360°πr²Area of the triangle = 1/2*AB*sinθHere, the length of the arc = 44 cmRadius = 28 cmFirst, we have to find out the angleθ by using the formula of length of the arc.Then,44 =θ/360°2πrθ = (44*7*360)/(2*28*22)θ = 90°Now, Area of the sector = 90/360*22/7*28*28Area of the sector = 616sq cmArea of the triangle = 1/2*28*28*sin90= 1/2*28*28*1Area of the triangle = 392 sq cmArea of the segment = 616 - 392Area of the sector = 224 sq cm |
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Jength of फौज xeclungle is Y o vhe ikbiserd 4 spresomt W in o fom o foreyet |
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| 68780. |
13. If /3 tan 0-1 - o, find the v2 e.INCERT EXEMPalue of sin-cosANSI |
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Answer» √3 tanθ = 1⇒ tanθ =1/√3⇒ tanθ = tan 30⇒θ =30°now, sin²θ - cos²θ = sin² 30 - cos² 30=1/2^2-1/√3^2=-1/2 |
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| 68781. |
\int _ { - \pi / 2 } ^ { \pi / 2 } x \operatorname { sin } x d x = 2 \int _ { 0 } ^ { \pi / 2 } x \operatorname { sin } x d x |
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| 68782. |
Ifαandβare the zeros of the quadratic polynomialf(x)=3x2−7x−6, find a polynomial whose zeros areα2andβ22α+ 3βand 3α+ 2β |
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Answer» pehle question to dhyan se dekh liya kro fir baad mein internet se copy krna and ur question is also different |
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| 68783. |
1. Factorise the following ex(a) x2 +9x + 20 |
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Answer» x^2+5x+4x+20=X(X+5)+4(X+5)=(X+5)(X+4 ) is the correct answer of the given question x²+9x+20=0sum=9: product=20number=5,4x²+5x+4x+20=0x(x+5)+4(x+5)=0(x+5)+(x+4)=0x=-5,-4 |
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| 68784. |
1 4X-5y = 38x-huy-o3) Form a quadratic polynomial whose zeros are 7 and -4. |
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Answer» (x+7)(x+4)= x^2+11×+28=0 sum of zeros= 7+(-4)=7-4=3product of zeros= 7×(-4)=-28polynomial = x^2-x(sum of zeros)+ product of zerosx^2-x(3)+(-28)x^2-3x-28 4x-5y=3; x=4; 4(4)-5y=3; 16-3=5y; 13=5y; y=13/5 |
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| 68785. |
Find the quadratic polynomial, the sum of whose zeros is v2 andtheir product is-12. Hence, find the zeros of the polynomial |
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| 68786. |
AR - TraB ले «+2-o x . o |
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| 68787. |
"And the equat,onok thethe deffesente of cohose distance fom-sibuus of a pointS,0S, DIS |
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Answer» 1 2 |
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| 68788. |
3x + 4y = 24, 20x - 11y = 47 |
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Answer» 3x+4y=24......(1) 20x-11y=47.....(2)multiply equation (1) with 11and equation (2) with 4 33x +44y= 26480x-44y=168add both the equationswe get, 113x=432x= 3.824y=47-3x4y=47-3(3.82)4y=35.54y=8.88 |
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| 68789. |
(i) 4x2 + 20x +25(NCERT Exemp |
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Answer» hit like if you find it useful |
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| 68790. |
•nomial in variable x.Write the general form of a quadratic polynomial and a cubic polynomial in variable |
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Answer» ax²+bx+c=0 is the quadratic polynomial.ax³+bx²+cx+d= 0 is the cubic polynomial is the correct answer of the given question ax^2+bx+c=0; The quadratic polynomial, the cubic polynomial ax^3+ bx^2+cx+d=0 |
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EXAMPLE 2.44. Given that (x-5) is a f+13x 3v5, find all theactor of the cubic polynomial-35xzeros of the polynomial. |
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| 68792. |
jilgUerweenpi2) aOne card is drawn wo a king of red colour(N) the jack of heartsand 6, (ii) an odd mumbet.n from a well-shuffled deck of 52 cards. Find the probability of getting(ii) a face card(v) a spade(ii) a red face card(vi) the queen of diamondsrthe ten, jack, queen, king and ace of diamonds, are well shufflid with therwards. One card is then picked up at random. |
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| 68793. |
In what ratio does the point (11, 18) divide the linejoining (3, 4) and (7, 11).(b)ho 91m of n terms of two |
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Answer» Thank you |
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| 68794. |
EXERCISE 9.2Find the zeroesthe zeroes and the coefficients.ofthe following quadratic polynomials and verify the relationship between1.0) x2-2x 8(iv) 4i +8u(ii) 4s-4s+ 1(v) 2-15(ii) 6x2- 3-7x(vi) 3x2-x-4 |
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| 68795. |
Iftwo zeroes ofthe polynomial xa-6d-26P + 1 3 8x-35 are 2 Âą 15. find other z |
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13. Find the quadratic polynomial whose zeros are 2 and -6. Verify therelation between the coefficients and the zeros of the polynomial. |
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| 68797. |
बल करcie (LTS ) 4oy g fCetts) =Soe b + एस |
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Answer» like if you find it useful waga |
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| 68798. |
cie trab the ce |
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Answer» (a+b)^2-c^2=(a+b+c)(a+b-c) the correct answer is 48 (a+b+c)(a+b-c) right answer (a+b+c) (a+b-c) is the right answer (a+b+c)(a+b+c) is correct answer (a+b)^2-c^2 is the answer (a+b+c) ( a+b-c) is the right answer |
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Inadjacent figures LB#ZEandgezBC:FJustilify your anowerIsLA Cie reason |
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Answer» Thank You |
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| 68800. |
. In a school library, the ratio of Mathematic andScience books is 2: 3. If there are 378 books, find the number of Mathematics bookcie |
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