Question

Arrange the following units of length in the correct order from the largest to the smallest:

• A. 3 - 1 - 4 - 2
• B. 2 - 4 - 1 - 3
• C. 4 - 2 - 3 - 1
• D. 3 - 4 - 1 - 2

Answer 1

The correct option is B 2 - 4 - 1 - 3

Metre is the standard unit of length.
One metre is equal to 100 centimetres.
One centimetre is equal to 10 millimetres.

So, one millimetre is smaller than one centimetre, and one centimetre is smaller than one metre.

Also, one kilometre is equal to 1000 metres. So, kilometre is larger than metre.

Therefore, the correct order of the given units from the largest to the smallest, is: millimetre < centimetre < metre < kilometre.
i.e. 2 - 4 - 1 - 3.