Mathematics - Application of Derivative Question with Solution | TestHub

A spherical iron ball of$10\mathrm{}\mathrm{c}\mathrm{m}$radius is coated with a layer of ice of uniform thickness that melts at a rate of$50\mathrm{}{\mathrm{c}\mathrm{m}}^3/\mathrm{m}\mathrm{i}\mathrm{n}$. When the thickness of ice is$5\mathrm{}\mathrm{c}\mathrm{m}$, then the rate (in$\mathrm{c}\mathrm{m}/\mathrm{m}\mathrm{i}\mathrm{n}$.) at which of the thickness of ice decreases, is: