A vertical pipe carrying liquid of specific gravity of 0.83 upwards from a pump contracts gradually from 105 mm diam. to 35 mm diam. over a length of 0.45 m. A water U-tube manometer is connected to two points 0.6 m apart in the two sections of the pipe and the head difference registered is 0.43 m. The connecting pipes are filled with the liquid that is flowing. Ignoring losses of energy, find the rate of flow.