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A solid is hemispherical at the bottom and conical (of same radius) above it . If the surface areas of the two parts are equal then the ratio of its radius and the slant height of the conical part is

A

`1 :2`

B

`2 :1`

C

`1 :4`

D

`4 :1`

Text Solution

Verified by Experts

The correct Answer is:
A
`2pi r^3 =pi rl rArr r/l = 1/2 `
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