Question

Arrange the following in increasing order of magnitude.

• A. 36 cm
• B. 3.8 m
• C. 5030 mm
• D. 0.0004 km

Answer 1

We need to convert all the quantities to a common unit, say metre inorder to compare.
We know,
$1cm=10mm$, $1m=100cm$ and $1km=1000m$

$0.0004km=0.0004\text{x}1000=0.4m$
$36cm=\frac{36}{100}=0.36m$
$5030mm=\frac{5030}{10\text{x}100}=5.03m$
Therefore, $5.03m>3.8m>0.4m>0.36m$
That is, $5030mm>3.8m>0.0004km>36cm$