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If thelenght of a body is to be measured...

If thelenght of a body is to be measured accurately upto 0.05 mm using a venier calliper with main scale divisions equal to 0.5 mm, how many divisions should be engraved on the vernier scale?

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Given, L.C. of vernier calipers = 0.05 mm.
1 M.S.D. of the V.C. = 0.5 mm
Then, the formula for least count, L.C. = (1M.S.D.)/(N)
This means N =` (1MSD)/(LC)`
From the above formula, find the number of V.S.D., (N)
N = 10
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