PLEASE SOLVE LETTER B  Solve using integration and please show graph: A cistern is a hole in the ground (usually lined with steel or cement) used to collect water. Suppose that we have a cylindrical cistern of radius 8 meters and the depth of 20 meters. a. If it is full of water, how much work is required to empty the cistern? b. What capacity of motos (in hp) is needed to pump the water, if we have to pump it in 10 minutes? [1hp=550 ft-lbf/sec]

Mathematics For Machine Technology
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PLEASE SOLVE LETTER B 

Solve using integration and please show graph:

A cistern is a hole in the ground (usually lined with steel or cement) used to collect water. Suppose that we have a cylindrical cistern of radius 8 meters and the depth of 20 meters.

a. If it is full of water, how much work is required to empty the cistern?

b. What capacity of motos (in hp) is needed to pump the water, if we have to pump it in 10 minutes? [1hp=550 ft-lbf/sec]

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