A trough is 7 meters long, 1.5 meters wide, and 5 meters deep. The vertical cross-section of the trough parallel to an end is shaped like an isoceles triangle (with height 3 meters, and base, on top, of length 1.5 meters). The trough is full of water (density (1000 kg/m^3) ). Find the amount of work in joules required to empty the trough by pumping the water over the top. (Note: Use (g=9.8 m/s^2) as the acceleration due to gravity.) ?

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