Question

How many millimetres will there be in a decimetre?

• A. 100
• B. 200
• C. 50
• D. 150

Hint:

1 decimetre equals 100 millimetres in the metric system.

Answer 1

The Correct Option is A

Step 1: Understanding Metric Conversions. 
1 decimetre (dm) is equal to 100 millimetres (mm) in the metric system. This is a simple conversion where 1 decimetre is one
-tenth of a metre, and 1 metre is 1000 millimetres. So, 1 decimetre is 100 millimetres. 
Step 2: Verifying the Options. 
- Option (1): 1 decimetre equals 100 millimetres, making this the correct answer. 
- Option (2): 200 millimetres is incorrect. 
- Option (3): 50 millimetres is incorrect. 
- Option (4): 150 millimetres is incorrect. 
Conclusion: 
Therefore, the correct answer is (1) 100.