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The mean length of an object is 5 cm. Wh...

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

A

`4.9 cm`

B

4.805 cm

C

5.25 cm

D

5.4 cm

Text Solution

Verified by Experts

The correct Answer is:
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 precise.
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