Glycerin is to be pumped at the rate of 250 gpm through a horizontal flow systen consisting of 1500ft of 4 inch,schedule 40 steel pipe.

Glycerin is to be pumped at the rate of 250 gpm through a horizontal flow systen consisting of 1500ft  of 4 inch,schedule 40 steel pipe. Neglecting minor losses, determine the reduction in pump BHP required by heating the oil from 50F to 100F.Assume pump efficiency of 80%.  Please show steps and answer in HP.