Four children measured the length of a table which was about $2 m$ . Each of them used different ways to measure it. Which one of them would get the most accurate length?

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Shyam measured it with a half-metre-long thread.

Gurmeet measured it with a 15cm scale from her geometry box.

Reena measured it using her handspan.

Salim measured it using a 5m long measuring tape.

answer is D.

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Detailed Solution

Salim measured it using a

5 m

long measuring tape which is most accurate because with a

5 m

long measuring tape, the table of

2 m

can be easily measured, and in other options, the measuring devices are smaller than

2 m .

[18]
In other words, Salim would obtain the most accurate measurement. Because the measuring tape is longer than the table, the length of the table may be measured in a single pass. In other cases, the possibility of creating an error is increased due to multiple measurements. In Salim's case, he can only measure lengths that are exact multiples of half a metre.

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