Mathmetics
ISBT Mathmetics for all banking PO,Clerk,IBPS PO,Railway,SSC,IAS,OAS Exams
Q1. |
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| 1) | 1 : 6 | 2) | 1 : 5 |
| 3) | 1 : 25 | 4) | 1 : 125 |
| 5) | None of these | ||
Answer : 1 : 5
Explanation :
Explanation :
The volume of the larger cube = 53 = 125 cm3.
The volume of each of the smaller cubes = 13 = 1 cm3.
Therefore, one would get 125 smaller cubes.
The surface area of the larger cube = 6a2 = 6(52) = 6 25 = 150
The surface area of each of the smaller cubes = 6 (12) = 6.
Therefore, surface area of all of the 125, 1 cm3 cubes = 125 6 = 750.
Therefore, the required ratio = 150 : 750 = 1 : 5
View AnswerQ2. |
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| 1) | 3 : 4 | 2) | 21 : 11 |
| 3) | 11 : 25 | 4) | 4 : 3 |
| 5) | None of these | ||
Answer : 21 : 11
Explanation :
Explanation :
Let the side of the cube be ‘a’
Volume of the cube = a3
Diameter of the sphere = a
View AnswerQ3. | The radius of a right circular cylinder is decreased by 5% but its height is increased by 10%. What is the percentage change in its volume ? |
| 1) | -0.25% | 2) | -0.625% |
| 3) | -0.725% | 4) | 1.25% |
| 5) | None of these | ||
Answer : -0.725%
Explanation :
Explanation :
View AnswerQ4. |
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| 1) | 72 cm2 | 2) | 216 cm2 |
| 3) | 432 cm2 | 4) | 108 cm2 |
| 5) | None of these | ||
Answer : 216 cm2
View AnswerQ5. |
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| 1) | 9:64 | 2) | 27:64 |
| 3) | 25:64 | 4) | 16:25 |
| 5) | None of these | ||
Answer : 25:64
View AnswerQ6. |
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| 1) | 5 cm | 2) | 8 cm |
| 3) | 10 cm | 4) | 12 cm |
| 5) | None of these | ||
Answer : 10 cm
View AnswerQ7. |
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| 1) | 36cm | 2) | 40cm |
| 3) | 60cm | 4) | 48cm |
| 5) | None of these | ||
Answer : 60cm
View AnswerQ8. |
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| 1) | 72 cm2 | 2) | 216 cm2 |
| 3) | 432 cm2 | 4) | 108 cm2 |
| 5) | None of these | ||
Answer : 216 cm2
View AnswerQ9. |
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| 1) | 259200 cm3 | 2) | 86400 cm3 |
| 3) | 720 cm3 | 4) | D.I |
| 5) | None of these | ||
Answer : 720 cm3
View AnswerQ10. |
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| 1) | 1 : 2 | 2) | 2 : 3 |
| 3) | 3 :1 | 4) | 3 : 4 |
| 5) | None of these | ||
Answer : 3 :1
View Answer