A spherical iron ball 10 cmin radius is coated with a layer of ice of – McqOptions

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1.	A spherical iron ball 10 cmin radius is coated with a layer of ice of uniform thickness that melts at a rate of 50 cm3/min. When the thickness of ice is 5 cm, then the rate at which the thickness of ice decreases, is [AIEEE 2005]
A.	\[\frac{1}{54\pi }\]cm/min
B.	\[\frac{5}{6\pi }\] cm/min
C.	\[\frac{1}{36\pi }\] cm/min
D.	\[\frac{1}{18\pi }\] cm/min
Answer» E.

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