A water tank leaks water at a rate proportional to the square root of the volume V of water remaining. The differential equation is:

A water tank leaks water at a rate proportional to the square root of the volume V of water remaining. The differential equation is:

• A. dV/dt = k√V
• B. dV/dt = −k√V
• C. dV/dt = −k/V
• D. dV/dt = −k V²

Answer: B) dV/dt = −k√V

Explanation: Leaking means the volume is decreasing over time. Proportional to square root of V means dV/dt = −k√V (where k is a positive constant).