According to Darcy's formula, the loss of head due to friction in the pipe is (where f = Darcy's coefficient, l = Length of pipe, v = Velocity of liquid in pipe, and d = Diameter of pipe)
A.flv²/2gd
B.flv²/gd
C.3flv²/2gd
D.4flv²/2gd
Answer: D
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