Question

The volume of a sphere is 904.32 cm3, find its radius and hence its curved surface area​

Answer 1

Volume =
`(4)/(3)` * π * r³ = 904.32 cm³

radius =
`\sqrt[3]{(3*Volume)/(4 * pi) }` cm=

=
`\sqrt[3]{(3 * 904.32)/(4 * 3.14) }` cm=

=
`\sqrt[3]{(2712,96)/(12.56) }` cm=

=
`\sqrt[3]{216}` cm=

radius = 6 cm

surface = 4 * π * r² cm² =

= 4 * π * 6² cm² =

= 4 * 3.14 * 36 cm² =

= 452,16 cm²