Mathematics

Problem

At a certain instant the volume of a cube is

125\,\text{cm}^3

and is increasing at

30\,\text{cm}^3\!\text{/s}

. What is the rate of change of its surface area at that instant? a)

60\,\text{cm}^2\!/\text{s}

12\,\text{cm}^2\!/\text{s}

24\,\text{cm}^2\!/\text{s}

72\,\text{cm}^2\!/\text{s}