Physics, asked by jeyakumar1745, 8 months ago

The radius of sphere is 21+-0.5 then find the surface area

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Answered by provati68

We know Sufrace Area of sphere (S) = 4π r2 = 4 × 227 (2.1)2 = 55.44 cm2 And Δ S = 8π r Δ r = 8 × 227 × 2.1 × 0.5 = 26.4 cm2 Therefore, The Ans is 55.44 ± 26.4 cm2.

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