7. Five marks exercise problem II

Water is flowing at the rate of \(15 \ km\) per hour through a pipe of diameter \(14 \ cm\) into a rectangular tank which is \(50 \ m\) long and \(44 \ m\) wide. Find the time in which the level of water in the tanks will rise by \(21 \ cm\).

 

Answer:

 

Time \(=\)  hours