Oil at 27°C ( ? = 900 kg/m3 and µ = 40 centi poise ) is flowing steadily in a 1.25 cm diameter, 40 m long pipe. During the flow, the pressure at the pipe inlet and exit is measured to be 8.25 bar and 0.97 bar, respectively. Determine the flow rate of oil through the pipe assuming the pipe is
(i) horizontal,
(ii) inclined 20° upward, and
(iii) inclined 20° downward.