A public park, in the form of a square, has an area of 100 ± 0.2 m 2 . The side of park is

Question

A public park, in the form of a square, has an area of 100 ± 0.2 m 2 . The side of park is, ( 10 ± 0.01 ) m, ( 10 ± 0.1 ) m, ( 10.0 ± 0.1 ) m, ( 10.0 ± 0.2 ) m

MARKS App · Accepted Answer

A = l 2 l = A = 10 m Δ A A = 2 Δ l l Δ l l = 1 2 Δ A A Δ l = 1 2 ( Δ A A ) l Δ l = 1 2 ( 0.2 100 ) × 10 = 0.01 m

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