Question

find the volume and surface area of a sphere of radius 21 cm

Answer 1

surface area of sphere = (4πr2)
so, 4×3.14×[21]2
so, S.A.= 5538.96 sq unit
Vol.is [4/3×π×(21)3]
so, V = 37803.40 cubic unit
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Answer 2

Surface area of a sphere=4πr

Surface area of a sphere=4πr 2

Surface area of a sphere=4πr 2 =4×

Surface area of a sphere=4πr 2 =4× 7

Surface area of a sphere=4πr 2 =4× 722

Surface area of a sphere=4πr 2 =4× 722

Surface area of a sphere=4πr 2 =4× 722 ×21×21cm

Surface area of a sphere=4πr 2 =4× 722 ×21×21cm 2

Surface area of a sphere=4πr 2 =4× 722 ×21×21cm 2

Surface area of a sphere=4πr 2 =4× 722 ×21×21cm 2 Surface area of the sphere=5544cm

Surface area of a sphere=4πr 2 =4× 722 ×21×21cm 2 Surface area of the sphere=5544cm 2

Surface area of a sphere=4πr 2 =4× 722 ×21×21cm 2 Surface area of the sphere=5544cm 2 .