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

A spherical iron ball of radius 10 cm is coated with 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 (in cm/ min unit) decreases, is-

A

`(1)/(18 pi)`

B

`(1)/(36 pi)`

C

`(5)/(6 pi)`

D

`(1)/(54 pi)`

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The correct Answer is:
A
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CHHAYA PUBLICATION-MCQ ZONE 3 -Question Paper 6
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