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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

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

B

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

C

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

D

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

Text Solution

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The correct Answer is:
A
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