A spherical iron ball \( 10 \mathrm{~cm} \) in radius is coated with a layer of ice of uniform thickness that melts at a…

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

[JEE Main 2020, 9 Jan (Shift 1)]