A crude oil of viscousity 0.97 poise and relative density 0.9 is flowing through a horizontal circular pipe of diameter 118mm and length of 9.9m. Calculate the difference of pressure at the two ends of the pipe, if 106kg of oil is collected in a tank in 43 seconds .

A crude oil of viscousity 0.97 poise and relative density 0.9 is flowing through a horizontal circular pipe of diameter 109mm and length of 10.1m. Calculate the difference of pressure at the two ends of the pipe, if 108kg of oil is collected in a tank in 40 seconds .