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March 29, 2017

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An engineer’s plan shows a canal with a trapezoidal cross section that is 8 ft deep and 14 ft across at the bottom with walls sloping outward at an angle of 45°. The canal is 620 ft long. A contractor bidding on the job estimates the cost to excavate the canal at $175/yd3. If the contractor adds 10% profit, what should the bid be?

  • Math - ,

    You need to know the thickness of the concrete canal walls, which should have been specified. Then you can compute the cubic yards of concrete required. The rest is easy.

  • Math - ,

    $12800

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