Question

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

Answer 1

Volume = $\frac{4}{3}$ * π * r³ = 904.32 cm³

radius = $\sqrt[3]{\frac{3*Volume}{4 * pi} }$ cm=

= $\sqrt[3]{\frac{3 * 904.32}{4 * 3.14} }$ cm=

= $\sqrt[3]{\frac{2712,96}{12.56} }$ 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