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A spherical iron ball 10 cm in radius is...

A spherical iron ball 10 cm in radius is coated with a layer of ice of uniform thickness that melts at a rate of `50 cm^(3)//`min. When the thickness of ice is 5 cm, then the rate at which the thickness of ice decreases, is :

A

`5/(6pi) cm//min`

B

`5/(54pi) cm//min`

C

`5/(18pi) cm//min`

D

`1/(36pi) cm//min`

Text Solution

Verified by Experts

The correct Answer is:
C
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