Find the volume and surface area of a sphere whose radius is:
(i) 3.5 cm
(ii) 4.2 cm
(iii) 5 m
(i) Radius of sphere = 3.5cm
Volume =
= 179.67cm3
Surface area = 4πr2
=
= 2 × 22 × 3.5 = 154 cm2
(ii) R = 4.2cm
Volume =
=
= 310.464cm2
Surface area = 4πr2
=
= 4 × 22 × .6 × 4.2
= 221.76cm2
(iii) R = 5cm
Volume =
= 523.80cm3
Surface area = 4πr2
=
= 314.28cm2 +