A submersible pump, whose characteristics are given in the following table, has been lowered to the bottom of a circular deep water pond 6 m in diameter. The pump is fitted with a discharge line 100 m...

A submersible pump, whose characteristics are given in the following table, has been lowered to the bottom of a circular deep water pond 6 m in diameter. The pump is fitted with a discharge line 100 m in length and 20.5 cm in diameter. The line rises vertically from the pump and then lies on a horizontal surface; the coefficient of pipe friction is 0.0075. The water level in the pond was 4 m below the ground surface. Find the time required to reduce the water level by 16 m, assuming there is no inflow into the water pond.