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A sphere and a cylinder have equal volume and equal radius. The ratio of the curved surface area of the cylinder to that of the sphere is
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- 4 : 3
- 2 : 3
- 3 : 2
- 3 : 4
- 4 : 3
Correct Option: B
| Volume of cylinder |
| = | πr³ | = 1 ⇒ | = | ||
| 3 | r | 3 | |||
| πr²h | h | 4 | |||
| ∴ | |
| Surface area of sphere |
| = | = | = | × | = | |||||
| 4πr² | 2r | 2 | 3 | 3 |
or 2 : 3
