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प्रश्न
Four children measure the length of a table which was about 2 m. Each of them used different ways to measure it.
- Sam 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 hand span.
- 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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उत्तर
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 case of Sam, only that lengths can be measured which are exact multiples of half a metre.
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संबंधित प्रश्न
Fill in the blank:
The S.I. unit of length is ............ of time is ............ of mass is ............
State if the following statement is true or false:
In ancient times, a cubit was used to measure the mass of an object.
Answer the following in short.
Which unit will you use to find the length of your notebook and why?
How many centimetres are there in 1m?
Name the device used to measure the following:
Your height.
Name the device used to measure the following:
Your weight.
State two precautions to be observed while measuring length with the help of a metre scale.
How can a measured length be expressed?
Why would you not like to use a measuring tape made of an elastic material like rubber to measure distance? What would be some of the problems you would meet in telling someone about a distance you measured with such a tape?
SI unit of length is ______.
