For the system-Water at 20°C flows by gravity through a smooth pipe fromone reservoir to a lower one. The elevation difference is 60 m.The pipe is 360 m long, with a diameter of 12 cm.  A pump, which delivers15,000 W to the water, is used at night to refill the upper reservoir. The pipe diameter is increased from 12 cm toprovide more flow. If the resultant flow rate is 90 m3/h, estimatethe new pipe size.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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For the system-Water at 20°C flows by gravity through a smooth pipe from
one reservoir to a lower one. The elevation difference is 60 m.
The pipe is 360 m long, with a diameter of 12 cm. 

A pump, which delivers
15,000 W to the water, is used at night to refill the upper reservoir. The pipe diameter is increased from 12 cm to
provide more flow. If the resultant flow rate is 90 m3/h, estimate
the new pipe size.

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