What is/are the precaution(s) need to be taken while making measurements with a ruler?

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The ruler should be very close to the object.

All of the above.

The eye should be in front of the point of measurement.

Avoid measuring with a broken ruler.

answer is D.

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Detailed Solution

When taking measurements with a ruler, it's important to:
- Ensure the ruler is very close to the object to get an accurate measurement.
- Position your eye directly in front of the point of measurement to avoid parallax error.
- Avoid using a broken or damaged ruler, as this can lead to incorrect measurements.

Therefore, All of the given options are correct.

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