Question
Which of the following is the most suitable instrument for measuring length of a curved line?
Answer: Option D
:
D
Foot is not a standard instrument of measurement. The length of the foot may vary from person to person. So it can't be used to measure the length of a curved line.
A thread is flexible. It can be bent easily to cover the curved line. It can then be straightened on a scale to measure the length.
Measuring cylinder is used to measure volume of liquids.
Thermometer is used to measure and indicate temperature of any object.
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:
D
Foot is not a standard instrument of measurement. The length of the foot may vary from person to person. So it can't be used to measure the length of a curved line.
A thread is flexible. It can be bent easily to cover the curved line. It can then be straightened on a scale to measure the length.
Measuring cylinder is used to measure volume of liquids.
Thermometer is used to measure and indicate temperature of any object.
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