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Math Help - Diameter and Cubic Yards

  1. #1
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    Diameter and Cubic Yards

    I need help with this. I just need to be guided...I don't want the answer. Thank you

    A 4 inch thick concrete slab is being poured for a circular patio 10 feet in diameter. Concrete costs $50 per cubic yard. Find the cost of the concrete. to the nearest cent.

    I know the diameter is going to be the distance across which is 10 ft, and then I am lost.
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  2. #2
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    Quote Originally Posted by ambergarrett955 View Post
    I need help with this. I just need to be guided...I don't want the answer. Thank you

    A 4 inch thick concrete slab is being poured for a circular patio 10 feet in diameter. Concrete costs $50 per cubic yard. Find the cost of the concrete. to the nearest cent.

    I know the diameter is going to be the distance across which is 10 ft, and then I am lost.
    Hi ambergarrett955,

    The shape is a cylinder 4 inches high (1/9 yd).

    The radius is 5 feet (5/3 yds).

    You need to find the volume of this cylinder in cubic yards.

    V=\pi r^2h

    Once you've determined the volume, multiply it by 50 to
    obtain the total cost.
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