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Question

Which of the following is correct about the correct measurement of length?

A
Measuring your classmate's height using long wooden scale
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B
Measuring your classmate's height using a small scale of 30cm long
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C
Measuring your classmate's height using a long steel rod
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D
All of the above
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Solution

The correct option is A Measuring your classmate's height using long wooden scale
Wood does not expand or contract on heating or cooling, but steel does. So, a long wooden scale may be used to measure height.

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