An ant travels from point A to point B, leaving a trail behind it. If you wish to measure the distance covered by the ant, which of the following objects would you choose?

Only a metre scale

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A straight rod of known length

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A metre scale and a thread

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Only a thread

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Solution

The correct option is C A metre scale and a thread
We cannot use a metre scale or a straight rod alone, as it cannot be bent along the curve.
A thread and a metre scale can be used to measure the required length as shown.

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An ant travels from point A to point B, leaving a trail behind it. If you wish to measure the distance covered by the ant, which of the following objects would you choose?

The correct option is C A metre scale and a threadWe cannot use a metre scale or a straight rod alone, as it cannot be bent along the curve. A thread and a metre scale can be used to measure the required length as shown.

The correct option is C A metre scale and a thread
We cannot use a metre scale or a straight rod alone, as it cannot be bent along the curve.
A thread and a metre scale can be used to measure the required length as shown.