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The density of a solid ball is to be det...

The density of a solid ball is to be determined in an experiment. The diameter of the ball is measured with a screw gauge, whose pitch is `0.5mm` and there are `50` divisions on the circular scale. The reading on the main scale is `2.5mm` and that on circular scale is `20` divisions. if the measured mass of the ball has a relative error of `2%`, the relative percentage error in the density is

A

`0.9%`

B

`2.4%`

C

`3.1%`

D

`4.2%`

Text Solution

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The correct Answer is:
c
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