1. Find the TSA of a hemisphere and a sphere of radius 70 cm
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T.S.A of Sphere => 4πr^2
T.S.A => 4 × 22/7 × 70 × 70
T.S.A => 880 × 70
T.S.A => 61,600 cm^2
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T.S.A of Hemisphere => 3πr^2
T.S.A => 3 × 22/7 × 70 × 70
T.S.A => 660 × 70
T.S.A => 46,200 cm^2
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