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

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

A

`4.9cm`

B

`805 cm`

C

`5.25 cm`

D

`5.4 cm`

Text Solution

Verified by Experts

The correct Answer is:
A
Given length
Now checking the erros with each options one by one, we get
`Delta l_(1) = 5 - 4.9 = 0.1cm`
`Delta l_(2) = 5 - 4.805 = 0.195cm`
`Delta l_(3) = 5.25 - 5 = 0.25cm`
`Delta l_(4) = 5.4 - 5 = 0.4cm`
Error `Delta l_(1)` is least.
Hence, `4.9cm` is most precise.
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