SOLUTION: How many cubic yards of earth must be removed in digging an artificial lake 15 feet deep,if the level bottom is a rectangle 180 feet by 20 feet and the top is a rectangle 216 feet

Question 159740: How many cubic yards of earth must be removed in digging an artificial lake 15 feet deep,if the level bottom is a rectangle 180 feet by 20 feet and the top is a rectangle 216 feet by 24 feet?Show solution and formulas.
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!
where is the depth of the lake, is the area of the bottom of the lake, and is the area of the surface of the lake. The area of the bottom and the surface is given by , and .

I'll leave it to you to plug in the values and do the arithmetic.
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