Arrange the following lengths in the increasing order of magnitude:

• 1 metre
• 1 centimetre
• 1 kilometre
• 1 millimetre

Since, 1 kilometre = 1000 metre
So, 1 kilometre > 1 metre

And 1 metre = 100 centimetre
So, 1 metre > 1 centimetre


And 1 centimetre = 10 millimetre
i.e 1 centimetre > 1 millimetre

Thus, the ascending order of length is:
1 millimetre < 1 centimetre < 1 metre < 1 kilometre