answer any one

(a)Derive the Equation for the average velocity of a fluid flowing through a pipe of diameter rw and show that the ratio between average velocity and maximum velocity is 0.5 (b)Draw the velocity profile and shear stress distribution for fluid flow in a circular pipe. An oil of viscosity 0.3 Ns/m2 and relative density 0.9 flows through a pipe of 100 mm and length 500 mm. The rate of flow is 3.5 lit/s. Calculate the pressure drop