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The mean length of an object is 5 cm. Which of the following measurements is most accurate?

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4.9 cm

4.805 cm

5.25 cm

5.4 cm

answer is A.

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Detailed Solution

Here, x = 5 cm

$Δ x_{1} = 5 - 4.9 = 0.1 c m$

$Δ x_{2} = 5 - 4.805 = 0.195 c m$

$Δ x_{3} = 5 - 5.4 = 0.4 c m$

Hence, option (a) is most accurate.

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