Question

The length of a young gram plant is $65mm$. Express its length in cm.

Answer 1

$1cm=10mm$ (Refer the ruler or scale you use)
From this, we can say,
$1mm=0.1cm$
Hence,
Let $65mm=xcm$
Thus,
$x=0.1\times 65$
So, $x=6.5cm$
So, the height of the gram plant is $6.5cm.$