1.

The mean length of an object is `5cm`. Which of the following measurement is most accurate?A. 4.9 cmB. 4.805 cmC. 5.25 cmD. 5.4 cm

Answer» Correct Answer - A
Given length, `l` = 5 cm
Now, checking the errors with each options one by one, we get
`Deltal_(1)`=5-4.9=0.1 cm
`Deltal_(2)` = 5-4.805=0.195 cm
`Deltal_(3)` = 5.25-5=0.25 cm
`Deltal_(4)` = 5.4-5=0.4 cm
Error `Deltal_(1)` is least.
Hence, 4.9 cm is most accurate.


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