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The curved surfaec area (c) of a cone is...

The curved surfaec area (c) of a cone is `pirl`, where `l=sqrt(r^(2)+h^(2))`, express h in terms of c and r.

A

` h = (1)/(pi r ) sqrt(c^(2) - pi ^(2) r^(4))`

B

` h = (1)/(pi r ) sqrt( c- pi ^(2) r^(2))`

C

` h = (1)/(pi r ) sqrt(c^(2) - pi ^(2) r^(2)) `

D

` h = (1)/(pi r ) sqrt(c+ pi ^(2) r^(4))`

Text Solution

Verified by Experts

The correct Answer is:
A
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