The precision of measuring devices can be increased with the use of a vernier scale, a small movable scale placed next to the main scale of the instrument, named after its inventor, Pierre Vernier $(1580-1637).$ ?It allows precise measurement of a fraction $($usually one$-$tenth or one$-$twentieth$)$ ?of the smallest division on the main scale. See a more detailed discussion at Wikipedia Vernier Scale.

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following calipers for the length, width, and height of a rectangular block. 10 20 30 40 0 1 2 3 4 5 6 7 8 9 10 0.1mm 1. Enter the length in mm. 22.5 X 10 20 30 40 0 1 2 3 4 5 6 7 8 9 10 0.1mm 2. Enter the width in mm. Enter an integer or decimal number, with exactly 3 significant figures [more..] 10 8- 20 30 0 1 2 3 4 5 6 7 8 9 10 0.1mm 3. Enter the height in mm. What is the volume of the rectangle block from the question above in mm. Calculator following calipers for the length, width, and height of a rectangular block. 10 20 30 40 0 1 2 3 4 5 6 7 8 9 10 0.1mm 1. Enter the length in mm. 22.5 X 10 20 30 40 0 1 2 3 4 5 6 7 8 9 10 0.1mm 2. Enter the width in mm. Enter an integer or decimal number, with exactly 3 significant figures [more..] 10 8- 20 30 0 1 2 3 4 5 6 7 8 9 10 0.1mm 3. Enter the height in mm. What is the volume of the rectangle block from the question above in mm. Calculator