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21 July, 20:00

To the nearest whole number, what is the surface area of a sphere with a volume of 140 cm3?

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  1. 21 July, 20:26
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    We know that V = 4/3 pi r^3

    So r^3 = 140 / ((4/3) pi) = 33.422538

    Hence r = 3.221166

    SA = 4 pi r^2

    = 4 pi 3.221166^2

    = 130.39 cm^2

    = 130 cm^2
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