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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 unirform thichness that melts at a rate of `50cm^3`/min. when the thickness of ice is 5 cm, then the rate at which the thickness of ice decreases, is

A

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

B

`(1)/(18pi) cm//min`

C

`(1)/(54pi) cm//min`

D

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

Text Solution

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The correct Answer is:
B
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