A spherical iron ball … cm in radius is coated with a layer of ice of uniform thickness that melts at a rate of … cm… /min. When the thickness of ice is … cm, then the rate at which the thickness of ice decreases is

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Application of Derivatives

JEE Main 2005 · Annual, Paper 1 · Q2739

MathematicsEasy175×since 2002Q2739

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

^3

/min. When the thickness of ice is

5

cm, then the rate at which the thickness of ice decreases is