The side of a square is measured as 10 cm with an absolute error of 0.1 cm. The percentage error in its area is approximately:

1. A 1%
2. B 2% Correct answer
3. C 0.5%
4. D 4%

Solution

$A = l^2 \Rightarrow \Delta A/A = 2\Delta l/l = 2 \times 0.1/10 = 2\%$.

About this question

Subject: Physics · Chapter: Units and Measurement · Topic: Errors in Measurement

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