# Question: a tank is full of oil weighing 20 lbft3 the...

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A tank is full of oil weighing 20 lb/ft^3. The tank is an inverted right rectangular pyramid (with the base at the top) with a width of 4 feet, a depth of 4 feet, and a height of 7 feet. Find the work required to pump the water to a height of 11 feet above the top of the tank.