A student measured the diameter of a wire using a screw gauge with the least count 0.001 cm and listed the measurements. The measures value should be recorded as:

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5.3200 cm

5.32 cm

5.320 cm

5.3 cm

answer is A.

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Detailed Solution

L.C has ' 3 ' digits after decimal point. Then answer should have the same no. of digits after decimal points.
since reading = P.S.R +L.C × n
reading should be upto third digit after decimal point

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