A spherical balloon is filled with $4500 \pi$ cubic metres of helium gas. If a leak in the balloon c

Question

A spherical balloon is filled with $4500 \pi$ cubic metres of helium gas. If a leak in the balloon causes the gas to escape at the rate of $72 \pi$ cubic metres per minute, then the rate (in metres per minute) at which the radius of the balloon decreases 49 minutes after the leakage began is\

Professor PC Thomas Classes · Answer

(a)\