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Four children measured the length of a table $2 m$ . 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

15 cm

scale from her geometry box.

Reena measured it using her handspan.

Salim measured it using a

5 m

long measuring tape.

answer is D.

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Detailed Solution

The correct length is given by Salim measured it using a

5 m

long measuring tape.
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

length can easily be measured. In other options, the measuring devices are smaller than

2 m

, so they will be used more than once to measure the length of the table, which increases the chance of errors and does not give an accurate result because the length of the table is more than the measuring devices. On the other hand, Salim used

5 m

long tape, so the length of the table can be measured by using it once only, thereby giving the most accurate measurement.

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