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24 May, 15:47

The volume of a sphere is 80pi cm3. What its is surface area to the nearest whole number

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  1. 24 May, 19:11
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    Volume = (4/3) * PI * radius^3

    80 * PI = (4/3) * PI * radius^3

    The 'PI's' cancel out leaving

    80 = (4/3) * radius^3

    radius^3 = 80 / (4/3)

    radius^3 = 60

    radius = cube root (60)
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