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There is an unknown quantity x=R(l)/(100...

There is an unknown quantity `x=R(l)/(100-l)`, here l is length (in cm) measured using a scale having least count of 1 cm and R is a quantity known accurately. Find the percentage error in measurement of x for `l=50cm`?

A

`1%`

B

`6%`

C

`2%`

D

`4%`

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The correct Answer is:
D
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