Question

If the edge of a ruler is worn out, how do you use it to take a correct measurement?​

Answer 1

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If the edge of the ruler is worn out or broken, the measurement should be started from any fully clear. For example, if you measure from 2 cm mark to the 7 cm mark, the length is 5 cm (7 cm – 2 cm = 5 cm). Eyes should be exactly above the point where the measurement is to be taken.