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A vernier callipers used by student has ...

A vernier callipers used by student has `20` divisions in `1cm` on main scale. `10` vernier divisions coincide with `9` main scale divisions. When jaws are closed, zero of main scale is on left of zero of vernier scale and `6th` divisions of vernier scale coincides with any mains scale divisions. He placed a wooden cylinder in between the jaws and measure the length. The zero of vernier scale is on right of `3.2 cm` mark of main division and `8th` division of vernier scale with any main scale division. When he measures diameter of cylinder he finds that zero of vernier scale lies on right of `1.5 cm` mark of main scale and `6th` division of vernier scale coincides with any main scale division.
Correct values of measured length and diameter are

A

`3.27 cm`, `1.5 cm`

B

`3.21cm`, `1.5 cm`

C

`3.27 cm`, `1.56cm`

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
B
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