Which is more : 7 metre OR 700 cm?(A) 700 cm (B) 7 m(C) Both are equal
The Correct Answer and Explanation is:
The correct answer is: (C) Both are equal
Explanation:
To compare 7 metres and 700 centimetres, we must convert both measurements into the same unit. Let’s convert 7 metres into centimetres.
Conversion formula:
1 metre = 100 centimetres
So,
7 metres = 7 × 100 = 700 centimetres
Now we compare:
- 7 metres = 700 cm
- The second value is already 700 cm
Since 700 cm = 700 cm, the two values are exactly equal.
Why this comparison is important:
When dealing with measurements in mathematics, science, construction, or daily life, understanding and converting between different units is crucial. The metric system is widely used for its simplicity, as it is based on powers of 10. In this system:
- 1 kilometre = 1,000 metres
- 1 metre = 100 centimetres
- 1 centimetre = 10 millimetres
This allows us to easily scale units up or down by multiplying or dividing by 10, 100, or 1,000.
In this example, converting 7 metres to centimetres helps us compare directly with 700 cm without guessing.
Common mistake to avoid:
Some students mistakenly believe that 700 is a larger number than 7, so 700 cm must be more than 7 metres. However, they forget to consider units. Comparing values without converting to the same unit leads to incorrect conclusions.
Think of it this way: Saying 7 metres is less than 700 centimetres is like saying 7 dollars is less than 700 cents — but 700 cents is also 7 dollars, so they are equal.
Final answer:
✅ (C) Both are equal
