Question

When a vernier calliper is used to measure exter-
nal and internal diameters of an aluminium tube, the
observations were made as follows:
For external diameter:
Main scale reading = 2.2 cm
Vernier coinciding division = 4
For inner diameter:
Main scale reading = 1.8 cm
Vernier coinciding division = 8
If the least count of vernier calliper is 0.1 mm, find
the thickness of the wall of the tube.​

Answer 1

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