V=Volume=4π(r^3)/3，dV/dr=4π(r^2)，so the rate of change of the volume, dV/dt=(dV/dr)*(dr/dt)=4π(r^2)*2，then you can calculate the value of dV/dt is 288 square inch per minute when r=6 inches，and 4608 square inch per minute when r=24 inches.The rate changes because it is related to both dr/dt and dV/dr, the latter of which i...
