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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.
| 19151. |
The volume ofor a hemisphere is 2425×1/2 cm3 .find its curvedone surface area |
| Answer» As, volume of hemisphere = 2425{tex}\\frac { 1 } { 2 } c m ^ { 3 }{/tex}{tex}\\Rightarrow \\frac { 2 } { 3 } \\pi r ^ { 3 } = 2425 \\frac { 1 } { 2 }{/tex}{tex}\\Rightarrow \\frac { 2 } { 3 } \\times \\frac { 22 } { 7 } r ^ { 3 } = \\frac { 4851 } { 2 }{/tex}{tex}\\Rightarrow r ^ { 3 } = \\frac { 4851 \\times 3 \\times 7 } { 2 \\times 2 \\times 22 }{/tex}{tex}\\Rightarrow r ^ { 3 } = \\frac { 441 \\times 3 \\times 7 } { 2 \\times 2 \\times 2 }{/tex}{tex}\\Rightarrow r ^ { 3 } = \\frac { 21 ^ { 3 } } { 2 ^ { 3 } }{/tex}{tex}\\Rightarrow r = \\frac { 21 } { 2 } c m{/tex}So, the curved surface area of the hemisphere ={tex}2 \\pi r ^ { 2 }{/tex}{tex}= 2 \\times \\frac { 22 } { 7 } \\times \\frac { 21 } { 2 } \\times \\frac { 21 } { 2 } = 693 \\mathrm { cm } ^ { 2 }{/tex} | |
| 19152. |
Solve for x: a/x-b +b/x-a =2X not =a,b |
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Answer» -soln:-a(x-a)+b(x-b)-2x(x-b)(x-a) ________________________ =0 (x-b)(x-a)=(a+1)(x-a)(x-b)(b-2x)______________________=0 (x-a)(x-b)=(a+1)(b-2x)=0=x=b/2 X X gyj y |
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| 19153. |
If the roots of the equation ( |
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| 19154. |
A train |
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Answer» Mujh se puuch rhi ho ? Kha se ho tm?? Me too mast Mst nd u?? ????? Hii aarushi how r u ?? Usme bhaithke jaa |
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| 19155. |
Does CBSE have grading system |
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Answer» Percentage system No YE ee |
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| 19156. |
SinA+cosA=0 find the value of tanA |
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| 19157. |
Which book we should refer for examination |
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Answer» U like sample papers Not any other Invert NCERT |
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| 19158. |
Why it is so tough |
| Answer» What | |
| 19159. |
If tanθ+sinθ=m and tanθ-sinθ=n.Show that m^2-n^2=4root of mn |
| Answer» Given, {tex}\\tan \\theta + \\sin \\theta = m{/tex} and {tex}\\tan \\theta - \\sin \\theta = n{/tex}L.H.S =\xa0{tex}m^{2}-n^{2}{/tex}{tex}=(tan\\theta+sin\\theta)^{2}-(tan\\theta-sin\\theta)^{2}{/tex}{tex}=tan^{2}\\theta+sin^{2}\\theta+2tan\\theta sin\\theta-[tan^{2}\\theta+sin^{2}\\theta-2tan\\theta sin\\theta]{/tex}{tex}=tan^{2}\\theta+sin^{2}\\theta+2tan\\theta sin\\theta-tan^{2}\\theta-sin^{2}\\theta+2tan\\theta sin\\theta{/tex}{tex}=4tan\\theta sin\\theta{/tex}R.H.S = 4{tex}\\sqrt{mn}{/tex}{tex}=4\\sqrt{(tan\\theta+sin\\theta)(tan\\theta-sin\\theta)}{/tex}{tex}=4\\sqrt{tan^{2}\\theta-sin^{2}\\theta}{/tex}{tex}=4\\sqrt{\\frac{sin^{2}\\theta}{cos^{2}\\theta}-sin^{2}\\theta}{/tex}{tex}=4\\sqrt{\\frac{sin^{2}\\theta-sin^{2}\\theta cos^{2}\\theta}{cos^{2}\\theta}}{/tex}{tex}=\\frac{4}{cos\\theta}\\sqrt{sin^{2}\\theta-sin^{2}\\theta cos^{2}\\theta}{/tex}{tex}=\\frac{4}{cos\\theta}\\sqrt{sin^{2}\\theta (1-cos^{2}\\theta)}{/tex}{tex}=\\frac{4}{cos\\theta} \\times sin\\theta \\times \\sqrt{sin^{2}\\theta}{/tex}{tex}=4tan\\theta sin\\theta{/tex}Hence, L.H.S = R.H.S | |
| 19160. |
Coor |
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| 19161. |
CosecA - cotACosecA+ cotA |
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| 19162. |
solve the following linear equation Ax-By and Bx+A=2a/a^2+b^2 |
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| 19163. |
Use Euclid division algorithm to find the HCF of 504 and 980 |
| Answer» Two positive integers are 980 and 504.Using the Euclid’s division lemma, we get980 = 504 {tex}\\times{/tex} 1 + 476Here the remainder {tex}\\ne{/tex}\xa00,504 = 476 {tex}\\times{/tex} 1 + 28Again the remainder {tex}\\ne{/tex}\xa00,476 = 28 {tex}\\times{/tex} 17 + 0Now the remainder is 0Divisor at this stage i.e. 28 is the HCF of 504 and 980.Hence HCF of 980 and 504 is 28. | |
| 19164. |
How g ( x) find them zeros are given |
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| 19165. |
Do you people know each other |
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Answer» Yes I also think so Guys tum ekdusre ko jante bhi ni and what the hell you all are talking Noop No Nope |
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| 19166. |
write maximumno. of zeroes for p(x)=x3+3x2-3x+1 |
| Answer» 3 | |
| 19167. |
Us molecular structure me main 10 hydrogen atoms honge. |
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Answer» Nw its not wrong Last wala CH3 at second place Wrong double bond comes in second place because I have written 2 butene Sry CH2- - C-CH2-CH3 K CH3 You can\'t understand this is secret Khu matlab Last me CH2 aiaga Tumne 11 hydrogen diya hai Khu akhe bana molecular structure 10 hi hain |
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| 19168. |
Among mg Al si p s . Which of these has highest ionization energy |
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Answer» Phosphorus is the correct answer S Why? Phosphorus Then what? Wrong Magnesium maybe |
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| 19169. |
Can you draw the molecular structure of 2-Methyl-2-butene? |
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Answer» Yes I can I can try Yes |
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| 19170. |
Find cosec60 and cos30 geometrically |
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| 19171. |
Ok ready for the next question. Name a sodium compound which is used for softening hard water. |
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Answer» Nice question Your chemistry is so good Yes the answer is sodium carbonate wow you are intelligent Na2C03.10H20 Washing soda Sodium carbonate Clorine |
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| 19172. |
Name two metals which are lighter than water |
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Answer» No the correct answer is aluminium and magnesium Potassium and sodium. By Google |
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| 19173. |
Name the two metals that exist both in native as well as combined state? |
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Answer» Yes right Copper and silver |
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| 19174. |
The sum of the square of two consecutive odd number is 394. Find the number. |
| Answer» 13 and 15 | |
| 19175. |
Prove that any positive even integer is in the form 6m,6m+2 |
| Answer» Not possible here | |
| 19176. |
Blueprint for 2017-18 |
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| 19177. |
Name the compound which form both ionic as well as covalent bond |
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Answer» ammonium chloride, NH4Cl. It has four covalent N-H bonds. It also has an ionic bond between NH4+ cation and Cl- anion. Lol??? Yes right answer is HCl because HCL dissociates into positive hydrogen and negative chlorine and when we draw its molecular structure it will be as H-Cl Nh4cl For your kind information covalent bond exist between non metals Maybe HCl NaCl can\'t be the answer because 1 parties metal and the other is non metal so it will form only ionic not covalent give the most accurate answer NaCl |
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| 19178. |
I wanted to ask you few questions |
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Answer» Ask Hum yahi par 10:00 to 10:30 milenge. Jo puch na hoga yahi puch lenge . Please it is my humble request Please calling is off now . Sometimes I will call you . My mom asked me who was that . Then I told lie. Are yr isi pe Puch lo You know when we were talking that day ,I didn\'t felt good OK You can\'t call me Ask bro No no no But it will take very much time can I CL ask you Yes ask |
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| 19179. |
CosA+sinA=1Proved that cosA--sinA=1 |
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| 19180. |
Root x is an irrational number |
| Answer» S | |
| 19181. |
2x+5y=k Kx+15y=18Find for k |
| Answer» K=6 | |
| 19182. |
2+3÷5= |
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Answer» 1 Kuch bhi to nhi hua yr Kya hua Miss riddhi first division nd then addition ....as 2+3/5 3.6 *riddhi Hey.. ridshi Hii friend 2.6 kyse hoga O Harshit 2.6 Hiiii 2.6 |
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| 19183. |
a and B are the zero of the polynomial x2-5x+m such that a-B=1,find m |
| Answer» a=1+ba+b=5/11+2b=52b=4b=2And a=1 +2=3Hence a×b=m/12×3=mm=6 | |
| 19184. |
ABC is a equalatral triangle and AE is a 1/3part of BC so prove that 9AE^=7BC^ |
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Answer» Proofed in ncert 10th class book. Mujhe v prblm h is question mein |
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| 19185. |
What is efflorescence? |
| Answer» Migration of substance like salt | |
| 19186. |
What\'s is real number |
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Answer» No.which can be obtained as an answer are called real no. Those number which can be shown on number line are known as real number... |
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| 19187. |
Yaha me topper kon kon hai upar se |
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Answer» I am house captain of my house. ???? I\'m class monitor |
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| 19188. |
What is water of crystallization |
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Answer» Fixed no. Of water molecules present in one formula unit of salts Sorry fixed 6 number of water molecule present in 1 formula unit of a compound |
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| 19189. |
Sin(90-A)=? |
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Answer» CosA CosA Cos A |
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| 19190. |
Wha we are doing |
| Answer» Enjoying | |
| 19191. |
tan 2A= cot(A-18) where 2A is an acute angle |
| Answer» A=24degree | |
| 19192. |
prove that triangle ABC is an isosceles triangle in which DE ||BC and BD||CE |
| Answer» By mid point there we can prove | |
| 19193. |
Find the common difference of ap whose n terms is given by sn=_2nsquare+ n |
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Answer» _4 rahega Sudhanshu tell -4 ya 4 Hum bhi mast hai Yes Mai to yar mst hun aur aap apna batayiye? It\'s right Aur bhai kaise ho Are yar 2 ke pahle - hai -4 |
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| 19194. |
ABCD is square of side 6cm find area of square |
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Answer» 36cm2 it\'s too easy 36sq.cm 36 cm square 36cm2 36 |
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| 19195. |
Why y(y-4)=0 ans=0&4 |
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Answer» Since y=0 and (y-4)=0 that will give us y=4 when we will shift 4 in RHS O ke right side send karoY ko karoge to 0/4And y_4=0=4 Oye maliram gaon konsa h thara |
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| 19196. |
For what value of k will k+9,2k-1and2k+7are the consecutive term of an ap |
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Answer» 18 18 |
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| 19197. |
What is algebric method? |
| Answer» It is actually a method by using which we solve equation having 2 variables | |
| 19198. |
Who is bhoot? |
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Answer» Ghumna ji koi kam konsi k ??? Noo Youuuu |
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| 19199. |
I have got 72/80 in maths prelims. Is it enough to impress my gf |
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Answer» Bro mai constructions prepare karke nahi gaya tha. Par jitna bhi solve kara hai utna right hai Mai to 80/80 laya tha pre boards me meri gf boli cheating kari hai 80 lekr batao to manegi Are no se kya mtlb h Nhi yar agar 79/80 ya 80/80 late aur jyada nice hota bro....vaise mst hai.....pakka impress ho jayegi?? Kon h aap ki gf |
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| 19200. |
Prove phythagoresgores theorem |
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Answer» Kishe bhi book m mile jayge Ncert me example hai |
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