Question of the Day 12-04-2021

Question of the Day
GATE 2015   ME   Question No. 62

Air $ (p=1.2\;kg/m^3 $ and kinematic viscosity , $ v=2\times10^{-5}m^2/s) $ with a velocity of 2 m/s flows over the top surface of a flat plate of length 2.5 m . If the average value of friction coefficient is Cf=1.328Rex, the total drag force (in N) per unit width of the plate is _____.