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The ratio of the surface area of a sphere and the curved surface area of the cylinder circumscribing the sphere is
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- 1 : 2
- 1 : 1
- 2 : 1
- 2 : 3
- 1 : 2
Correct Option: B
Let Height of the cylinder = 2r,
where r = radius of sphere.
Radius of cylinder = r
| ∴ | |
| Curved surface area of cylinder |
| = | = 1 : 1 | |
| 2πr × 2r |
