Problem 1  A rectangular tank that is 4 feet long, 7 feet wide, and 9 feet deep is filled with a heavy liquid that weighs 60 pounds per cubic foot. In each part below, assume that the tank is initially full. Include correct units.  c) How much work is done pumping two-thirds of the liquid out over the top of the tank?  d) How much work is done pumping two-thirds of the liquid out of a spout 2 feet above the top of the tank? Note: C does not equal 60,480 lb-ft and D does not equal 80,640 lb-ft

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