Question: A vertical dam on a large lake is 3 0 ft tall and 6 0 ft wide, and the water level is 5 ft below

A vertical dam on a large lake is 30 ft tall and 60 ft wide, and the water level is 5 ft below the top of the dam. In the middle of the dam at the very bottom is a gate in the shape of anequilateral triangle 12 ft on a side as shown in the figure below. (Assume a density of water p =62.4 lb/3.)

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