Question

Surface area of sphere is 154 sq.cm find its diameter

Answer 1

surface area of sphere=154 sq.cm
4×22/7/r^2=154
4×22×r^2=154×7
r^2=154×7/22×4
r^2=1078/88
r^2=12.25
r=root 12.25
r=3.5 cm

RADIUS OF THE SPHERE=3.5CM


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