Which of the following can be used to measure the length of a circular track ?

A string

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A cubit

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A metre scale

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A wooden ruler

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Solution

The correct option is A
A string

The best method to measure the length of a curved line is with the help of a string. A string can be used to trace the length of the circular track and the edges can be marked. The string can then be stretched out completely to form a straight line and measured with the help of a standard measuring tape.

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