SOLUTION: A construction engineer needs to make 25 square concrete slabs with sides of length x feet and a height x - 3 feet. If the engineer can use at most 350,000ft^3 of concrete, what sh

Algebra ->  Percentage-and-ratio-word-problems -> SOLUTION: A construction engineer needs to make 25 square concrete slabs with sides of length x feet and a height x - 3 feet. If the engineer can use at most 350,000ft^3 of concrete, what sh      Log On


   



Question 1021990: A construction engineer needs to make 25 square concrete slabs with sides of length x feet and a height x - 3 feet. If the engineer can use at most 350,000ft^3 of concrete, what should the dimensions of each slab be, to the nearest foot?
a. Write an expression for the volume of all the slabs.
b. What should x equal, to the nearest foot?

Answer by josgarithmetic(39630) About Me  (Show Source):
You can put this solution on YOUR website!
One slab volume is x%2Ax%2A%28x-3%29, and must be 25 of them.

25%2Ax%5E2%28x-3%29=350000

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