1. The problem statement, all variables and given/known data OK, here is my problem. There's a tank, continuously filled by water from top, at 5 L/minute flow rate. The tank has a hole on bottom (at h=0) of it, so water also come out through it. The Area of hole is 1 cm2 and Area of tank is 0.25 m2. The height of the tank supposed to be very high so water can't out. The question is about equation h(t), that is height of water in the tank versus time. 2. Relevant equations My teacher told us to start from Bernoulli's Law, but I'm stuck now...the problem just confused me because there is continuously water supply.... 3. The attempt at a solution I realized that water flow at the hole is dependent on height of the water, and height is also dependent on time. Any idea? Please help me. Thanks in advance.