Question : While measuring a line segment of length 10 cm, it was measured 10.2 cm by mistake, what is the percentage error in measurement?
Option 1: 1%
Option 2: 0.5%
Option 3: 0.2%
Option 4: 2%
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Correct Answer: 2%
Solution : Given: Correct measurement value = 10 cm Measurement by mistake = 10.2 cm Error = 10.2 – 10 = 0.2 Error percentage = $\frac{\text{Error}}{\text{Correct measurement value}}\times100$ = $\frac{0.2}{10}\times100$ = 2 Hence, the correct answer is 2%.
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