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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=5cm`
Now, checking the errors with each options one by one, we get
`Deltal_(1)=5-4.9=0.1cm`
`Deltal_(2)=5-4.805=0.195cm`
`Deltal_(3)=5.25-5=0.25cm`
`Deltal_(4)=5.4-5=0.4cm`
`"Error"Deltal_(1)"is least."`
`"Hence,"4.9 cm " is most precise."`
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