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A fuel oil tank is an upright cylinder, buried so that its circular top is 12ft beneath ground level. The tank has a radius of

A fuel oil tank is an upright cylinder, buried so that its circular top is 12ft beneath ground level. The tank has a radius of 3ft and is 9ft high, although the current oil level is only 7ft deep. Calculate the work required to pump all of the oil to the surface, assuming that oil weighs 50lb/ft3.

Work is = ft/lb

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