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Which scale represents only two units or a unit and its sub-division?

Which scale represents only two units or a unit and its sub-division? Correct Answer Plane scale

A plain scale is constructed by dividing a line into the suitable number of equal parts or units, the first of which is sub-divided into smaller parts. Plain scales represent either two units or a unit and its sub-division.

Related Questions

Raw material purchased:
1st January, 600 units @ Rs. 12 per unit
12th January, 500 units @ Rs. 14 per unit
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3rd January 300 units
5th January 124 units
15th January 250 units
16th January 300 units
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