From a reservoir A, whose free surface is at an elevation of 25m, water flows into another reservoir B, whose surface is

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From a reservoir A, whose free surface is at an elevation of
25m, water flows into another reservoir B, whose surface is at an
elevation of 18m. The reservoirs are connected by a 30cm diameter,
30m long pipe (f=0.020) followed by another 30m of 15cm pipe
(f=0.015). There are two 90° elbows in each pipe (k=0.50 for each
of them), K for contraction is equal to 0.75 and the 30 cm pipe
enters tank A. If the elevation of the sudden contraction is 16m.
Determine the head of pressure in the 30 and 15 cm pipes at the
section change.
Present a plan to scale using a grid sheet.