Please help me with this physics sum......?

Question

A water pump is pumping water at a rate of 72 meter cubes per hour to a height of 50m....

Motor of the pump is consuming power at the rate of 1.25kW..... What is the efficiency of the pump....

Answer 1

12.5

Answer 2

Work done = mgh = 72000*10*50 = 36,000,000J

Power required = Work/time = 36000000/3600= 10,000W

Power required is 10kW

As the pump is consuming power at the rate of 1.25kW, it must be a super efficient pump!!