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24 December, 01:03

What is the area of the base of the cone below? Round the answer to the nearest tenth if necessary. A cone with height 8 inches and volume 52 inches cubed. 14.7 inches squared 17.3 inches squared 18.5 inches squared 19.5 inches squared

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  1. 24 December, 05:02
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    The area of the circle is 19.5 in²

    Step-by-step explanation:

    First of all to solve this problem we have to know the formula to calculate the volume of a cone

    v = volume = 52 in³

    r = radius

    h = height = 8 in

    π = 3.14

    v = 1/3 * π * r² * h

    we solve r

    3 * v / h * π = r²

    we replace the known values

    3 * 52 in³ / 3.14 * 8 in = r²

    156 in³ / 25.12 in = r²

    6.21 in² = r²

    √6.21 in² = r

    2.49 in = r

    now that we have the radius we need to use the area formula of a circle:

    a = area

    r = radius = 2.49 in

    π = 3.14

    a = π * r²

    we replace the known values

    a = 3.14 * (2.49 in) ²

    a = 3.14 * 6.21 in²

    a = 19.5 in²

    The area of the circle is 19.5 in²
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