Question

The main scale of a vernier callipers is calibrated
in mm and 19 divisions of main scale are equal in
length to 20 divisions of vernier scale. In measuring
the diameter of a cylinder by this instrument, the
main scale reads 35 divisions and the 4th division
of vernier scale coincides with a main scale division.
Find (i) least count and (ii) radius of cylinder.​

Answer 1

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