(a) Derive an expression for loss of head due to friction in pipe. (b…

Previous year question for Exam.

Question

(a) Derive an expression for loss of head due to friction in pipe.

(b) An old water supply distribution pipe $25\text{ cm}$ dia of a city is to be replaced by two parallel pipes of smaller dia having equal lengths and identical friction factor values. Find out the new dia required.

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