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The height and radius of the cone of whi...

The height and radius of the cone of which the frustum is a part are `h^(1)` units and `r_(1)` units respectively. Height of the frustum is `h_(2)` units and radius of the smaller base is `r_(2)` units. If `h_(2) : h_(1)= 1 : 2 " then " r_(2) : r_(1)` is

A

`1:3`

B

`1:2`

C

`2:1`

D

`3:1`

Text Solution

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The correct Answer is:
B
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