Drag force on a plate - GATE ME '15 S1

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Air ( ρ=1.2 kg/m^3 and kinematic viscosity, v=2×10−5 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 = 1.328/√Rex, the total drag force (in N) per unit width of the plate is ____________

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