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6 October, 13:52

A concrete pillar has the shape of a cylinder. It has a radius of 4 meters and a height of 7 meters. If concrete costs $94 per cubic meter, how much did the concrete cost for the pillar? Use 3.14 for π, and do not round your answer.

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  1. 6 October, 16:29
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    C = $33,057.92

    The cost of the pillar is $33,057.92

    Step-by-step explanation:

    Given;

    Radius of the concrete r = 4 m

    Height h = 7 m

    Cost per volume R = $94 per cubic meter

    π = 3.14

    The volume of the cylinder shape concrete is;

    V = πr^2 h

    Substituting the given values;

    V = 3.14*4^2 * 7

    V = 351.68 m^3

    The cost of the pillar is C;

    C = Volume * cost per volume

    C = V * R

    C = 351.68 m^3 * $94 per cubic meter

    C = $33,057.92

    The cost of the pillar is $33,057.92
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