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A vernier callipers having 1 mai scale d...

A vernier callipers having 1 mai scale divison `=0.1cm` is designed to have a least count of `0.02cm`. If `n` be the number of divisions on vernier scale and `m` be the length of vernier scale, then

A

n=10, m=0.5 cm

B

n=9, m=0.4 cm

C

n=10, m=0.8 cm

D

n=10, m=0.2 cm

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