1. The problem statement, all variables and given/known data Water runs into a cylindrical tank at the rate of 0.6m^3/s. The tank has a heigh of 2.5m and a base radius of 1.2m. How fast is the water level rising when the water level is 1.6m deep. 2. Relevant equations V=∏ x r^2 x h 3. The attempt at a solution I know that 0.6m^3/s is dV/dt which should mean that the equation looks something like this: dV/dt=(dV/dh)(dh/dt). When differentiating volume with respect to height though, the h is eliminated and is makes no sense if the question is giving the h variable.