Answer to Question #50777 in Mechanics | Relativity for tinn

Question

a fulfilled well is 10 m deep and has a radius of 4 m.a 6.87 H.P pump is used to empty the well in 20 minutes. but after emptying half of the well, it got damaged. after how much time the pump got damaged? if another pump is used to empty the rest of the well in the limited time,will the power of the 2nd pump be same of the 1st one? mathematically explain