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The total surface area of a solid right circular cylinder is twice that of a solid sphere. If they have the same radii, the ratio of the volume of the cylinder to that of the sphere is given by
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- 9 : 4
- 2 : 1
- 3 : 1
- 4 : 9
- 9 : 4
Correct Option: A
According to question, 2πrh + 2πr² = 8πr²
⇒ 2πrh = 6πr²
| ∴ Required time = | = 2 hours | |
| r |
| ∴ Required ratio = πr²h : | πr³ | |
| 3 |
= 3h : 4r = 9 : 4
