Water at 20°C flows through a vertical tapered pipe at 163 m3/h, the entrance diameter is 12

Question:

Water at 20°C flows through a vertical tapered pipe at 163 m3/h, the entrance diameter is 12 cm, and the pipe diameter reduces by 3 mm for every 2 meter rise in elevation. For frictionless flow, if the entrance pressure is 400 kPa, at what elevation will the fluid pressure be 100 kPa?

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