I am a verneir Calliper. I have a task to measure the length of a pencil as shown in the
Channel: Doubtnut
Date: 2020-01-26

I am a verneir Calliper. I have a task to measure the length of a pencil as shown in the figure. The least count of my Vernier scale is `0.05` times the value of one division of main -scale. My Vernier Scale has `n`-divisions and coincides with `(n-4)` divisions of main side. While measuring the length of pencil,the `n/5th` division of Verier-Scale exactly coincide the main scale. Now choose the correct option (s)