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

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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(12126) About Me  (Show Source):
You can put this solution on YOUR website!
V+=+h%28B%5B1%5D%2BB%5B2%5D%2Bsqrt%28B%5B1%5DB%5B2%5D%29%29%2F3 where h is the depth of the lake, B%5B1%5D is the area of the bottom of the lake, and B%5B2%5D is the area of the surface of the lake. The area of the bottom and the surface is given by A=lw, 180+%2A+20 and 216+%2A+24.

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