An Open Tank Has the Shape of a Right Circular

question 9

Multiple Choice

An open tank has the shape of a right circular cone. The tank is 9 feet across the top and 8 feet high. How much work is done in emptying the tank by pumping the water over the top edge? Note: The density of water is 62.4 lbs per cubic foot.

• A) 6,739.20 ft-lb
• B) 4,043.52 ft-lb
• C) 5,391.36 ft-lb
• D) 10,108.80 ft-lb
• E) 12,130.56 ft-lb

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