Question 7
A pump can fill a tank with water in 2 hours. Because of a leak, it took $2\frac23$ hours to fill the tank. How many hours the leak can drain all the water of the tank?
Tank convention: filling starts with an empty tank; pump and leak rates are constant. For the requested draining time, start with a full tank and turn the pump off.
Tank convention: filling starts with an empty tank; pump and leak rates are constant. For the requested draining time, start with a full tank and turn the pump off.