Ahorizontal pipe of 5 cm diameter conveys an oil of specific gravity 0.9 and dynamic viscosity 0.8 kg/ms measurement indicates a pressure drop of 20 kn/m2 per meter of pipe length traversed. calculate the following (3.1), the flow rate of the oil and the centre line velocity (3.2), the wall shear stress (3.3). the frictional drag over 100 m of pipe length, (3.4). the power of the pump required assuming an overall efficiency of 60%, (3.5), the velocity at 1 cm from the pipe surface and (3.6), the shear stress ant also at 1 from the pipe wall.