Question $10$

$10$ marks

A pipe $20cm$ diameter is $20m$ long and velocity in pipe is $8\frac{m}{sec}.$ What loss of head would be result if the last $5m$ length of pipe is replaced by $30cm$ diameter pipe with the change in section being sudden as shown? Assume $F=0\mathrm{.}04,$ for both pipes. Neglect entry and exit losses.

Hint $1$: Refer to Darcy Equation $h_L=$dots