Question

Length and breadth of a recatangle are 5.7+-0.1cm and breadth is 3.4+-0.2cm .Calculate area of reactangle with error limit.

Answer 1

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Length = 5.7 ± 0.1 cm
breadth = 3.4 ± 0.2 cm

A = Lb
= (5.7 × 3.4)
= 19.38 cm²

ΔA = A × (ΔL/L + Δb/b)
= 19.38 × (0.1/5.7 + 0.2/3.4)
= 1.48 cm²

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Answer 2

Hey mate here is your answer :

• Area of ractangle = l * b
= 5.7 * 3.4
= 19.38

deltaA/A = deltal/l + deltaB/B (area of rectangle)
= 0.1/5.7 + 0.2/3.4
= 1/57 + 2/34
= 34 + 114 / 1938
= 148/1938 * 19.38
= 1.5