Water flows through a horizontal pipe at a rate of 1 literisec. The pipe consists of two sections of diameters 5 crn and 2 cm with a smooth reducing section. The pressure difference between the two pipe sections is measured by a mercury manometer. Neglecting frictional effects, determine the differential height of mercury between the two pipe sections. (density of water =1000 kg m 3 and density of mercury =13600 kg/m 3 )