Advertisements
Advertisements
Question
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.
Advertisements
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 case of Sam, only that lengths can be measured which are exact multiples of half a metre.
APPEARS IN
RELATED QUESTIONS
Fill in the blank:
The S.I. unit of length is ............ of time is ............ of mass is ............
Answer the following in short.
Which unit will you use to find the length of your notebook and why?
Why can hand span and arm length not be used as standard units of length?
Name the measuring device which can be used for measuring the girth of a tree.
Name the device used to measure the following:
Your weight.
How can a measured length be expressed?
One metre is ______ cm.
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?
Match the following:
| 1. | Length | a. | Litre |
| 2. | Mass | b. | Seconds |
| 3. | Time | c. | Kilogram |
| 4. | Volume of liquid | d. | Metre |
SI unit of length is ______.
