Four children measured the length of a table which was about 2 m. Each of them used different ways to measure it.
(i) Sam measured it with a half metre long thread.
(ii) Ram with a 15 cm scale from her geometry box.
(iii) Reena measured it using her hand span.
(iv) Salim measured it using a 5 m long measuring tape.
Which one of them would get the most accurate length? Give reason for your answer.

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Solution

Salim would get the most accurate length because he is using a 5 m long measuring tape which is longer than the table. So, he can measure the length of the table in one go accurately. While in the other cases the chance of making an error is higher due to multiple measurements. In the case of Sam, only that length can be measured which are exact multiples of half a metre.

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