Oil having a viscosity of  0.8 poise flows through a 50 mm diameter pipe. The laminar flow distribution of velocity is given by

\(u = 1.4\left( {1 - {{\left( {\frac{r}{R}} \right)}^2}} \right)~\)

where R = radius of the pipe

r = radial Coordinate

Calculate Pressure drop for 1 m Length of pipe in KN/m2.