A magic tank starts out 4 inches in length, 4 inches wide, and 12 inches deep. As the tank is filled, it magically expands proportionally keeping it rectangular form just big enough to hold the liquid. If the liquid is being pumped into the tank at 8 cubic inches per minute, what is the rate at which the height of the tank is changing with respect to time when the height is 12 inches?
3 answers