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One main scale division of vernier calli...

One main scale division of vernier calliper represents 1mm and 10 vernier scale divisions matching with 9 main scale divisions. Zero error of vernier is 0.4mm. If a sphere is lifted between the jaw. The zero of vernier scale lies between 30th and 31th mark of main scale and 6th vernier scale mark matches with some main scale mark. The diameter of the sphere will be.

A

a. 3.02cm

B

b. 3.10cm

C

c. 3.06cm

D

d. 3.08cm

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