An Open Tank Has the Shape of a Right Circular $6,739.20 \pi \mathrm { ft } - \mathrm { lb }$

question 41

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) \(6,739.20 \pi \mathrm { ft } - \mathrm { lb }\)
• B) \(4,043.52 \pi \mathrm { ft } - \mathrm { lb }\)
• C) \(5,391.36 \pi \mathrm { ft } - \mathrm { lb }\)
• D) \(10,108.80 \pi \mathrm { ft } - \mathrm { lb }\)
• E) \(12,130.56 \pi \mathrm { ft } - \mathrm { lb }\)

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