Question

How many decimetres are there in a metre?

• A. 40
• B. 20
• C. 10
• D. 50

Hint:

1 metre = 10 decimetres. "Deci" means one-tenth of a unit.

Answer 1

The Correct Option is C

Step 1: Understanding the Metric System.
A decimetre (dm) is one-tenth of a metre. Therefore, in 1 metre, there are 10 decimetres. This is based on the metric system, where each unit is divided by powers of 10.
Step 2: Verifying the Options.
- Option (1): 40 decimetres is incorrect because 1 metre contains only 10 decimetres.
- Option (2): 20 decimetres is incorrect, as this is too many for a single metre.
- Option (3): 10 decimetres is the correct answer because 1 metre equals 10 decimetres.
- Option (4): 50 decimetres is incorrect.
Conclusion:
Therefore, the correct answer is (3) 10.