12-12-2016
Mathematics

contestada

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

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Aliwohaish12 Aliwohaish12

12-12-2016

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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