A certain reach of an open channel 1 mile in length is excavated through permeable soil. The rate of inllow to this reach is 100.0 ft 3 /s and the rate of outflow is 95 ft 3 /s. How much of the water...

A certain reach of an open channel 1 mile in length is excavated through permeable soil. The rate of inllow to this reach is 100.0 ft³/s and the rate of outflow is 95 ft³
/s. How much of the water is being lost through this reach every year?

A cylindrical tank is supplied with water at a flow rate of 80 liter/min. Two outlet pipes are connected to the base of the tank extracting water at flow rates of 50 and 35 liter/min, respectively. Calculate the rate of change of the water volume inside the tank per min. If the diameter of the tank is 60 cm, determine the change in the water level after one hour.