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Question
The mean length of an object is 5 cm. Which of the following measurements is most accurate?
Options
4.9 cm
4.805 cm
5.25 cm
5.4 cm
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Solution
4.9 cm
Explanation:
Given, length `l` = 5 cm
Now, Checking the errors with each option one by one, we get
`Δl_1` = 5 – 49 = 0.1 cm
`Δl_2` = 5 – 4.805 = 0.195 cm
`Δl_3` = 5.25 – 5 = 0.25 cm
`Δl_4` = 5.4 – 5 = 0.4 cm
Error `Δl_1` is the least.
Hence, 4.9 cm is the most precise.
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