- Now we use International system of units (SI) is used as standard units all over the world.
- Metre (m) is the SI unit of length.
- 1m = 100 cm = 1000 mm and
- In our daily life we use various types of measuring devices such as metre scale, measuring tape, metre rod etc.
- The use of a measuring instrument depends on the nature of object and the type of surface of object.
- The length of a curved line can be measured with the help of a thread b…
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