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Standardising Units

A hand-span g...

Question

A hand-span gives an accurate measurement of length.

A

True

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B

False

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Solution

The correct option is B False
The measurement of length can be done accurately with the help of various measuring tools such as a ruler, meter rod, measuring tape, Vernier-caliper, and screw-gauge.
A hand span is not used as a standard unit of length because its size varies from person to person.
Hence, the given statement is false.

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(b) accurate measurement is not necessary and only estimation is required Give reasons.

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