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The accuracy of measurement also lies in...

The accuracy of measurement also lies in the way the results is expressed. The number of digits to which a value is to be expressed is one digit more than number of digits after after an operation is carried out on the given values. The error can be minimised by many trials and using the correct methods are instruments.
If the length and breadth are measured as `4.234 and 1.05 m`, the area of the rectangle is

A

`4.4457 m^(2)`

B

`4.45 m^(2)`

C

`4.446 m^(2)`

D

`0.4446 m^(2)`

Text Solution

Verified by Experts

The correct Answer is:
B
`A = lb = 4.4457 m^(2) = 4.45 m^(2)`
One should retain only three significiant figures.
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Knowledge Check

  • The accuracy of measurement also lies in the way the results is expressed. The number of digits to which a value is to be expressed is one digit more than number of digits after after an operation is carried out on the given values. The error can be minimised by many trials and using the correct methods are instruments. The order of magnitude of 147 is

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    D
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    B
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