where 
 where 
Solution Procedure:
(i) Determine 
(ii) Assume a value for f using the Moody diagram. (Locate and move horizontally across the diagram to the f axis)
(iii) Using f calculate  from 
(iv) Use to determine Re from 
(v) Using and Re, determine f
(vi) Compare f obtained in (v) with f assumed in (ii). If they are the same, STOP. If not, repeat steps (iii) through (vi) until convergence is attained
(vii) After convergence calculate the discharge using 
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