$\"\"$ \ \

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The base of the rectangular tank length is $\"\"$ . \ \

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The breadth and height are $\"\"$ and $\"\"$ . \ \

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The weight of the water is $\"\"$ pounds for cubic foot. \ \

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(a)

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Find the work done by the pump when in order to empty the half of the tank.

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The distance is $\"\"$ .

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The volume of the water is $\"\"$ .

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The force of the water is $\"\"$ .

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Work done by the pump inorder to empty the half of the tank is $\"\"$ .

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Substitute $\"\"$ and $\"\"$ and $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$

\

$\"\"$

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Work done by the pump inorder to empty the half of the tank is $\"\"$ .

\

$\"\"$

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(b)

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Work done by the pump inorder to empty the all of the tank is $\"\"$ .

\

Substitute $\"\"$ and $\"\"$ and $\"\"$ .

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

Work done by the pump inorder to empty all of the tank is $\"\"$ .

\

$\"\"$

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(a) Work done by the pump inorder to empty the half of the tank is $\"\"$ .

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(b) Work done by the pump inorder to empty all of the tank is $\"\"$ .