Answer:
The correct option is 'e': f = 0.05.
Explanation:
The head loss as given by Darcy Weisbach Equation is as
where
is head loss in the pipe
'f' is the friction factor
'l' is the length of pile
'v' is the velocity of flow in pipe
'D' is diameter of pipe
From equation of contuinity we have
Thus using this in darcy's equation we get
where
'Q' is discharge in the pipe
'A' is area of the pipe
Applying the given values we get
Solving for 'f' we get