Question 9
Andy will fill either tank A or tank B, aiming for the highest water level after 20 minutes. Tank A measures $60\text{ cm}\times10\text{ cm}\times30\text{ cm}$ and tank B measures $20\text{ cm}\times20\text{ cm}\times30\text{ cm}$. Tank B leaks at $150\text{ cm}^3$ per minute. Which tank should he fill using a pipe delivering $600\text{ cm}^3$ per minute?
