Question

A map is drawn to a scale of $120$ cm to the $1$ km. How many square cm on the map will represent a hectare of ground?

Answer 1

$1$ hectare$=$ $10000$ sq.m
$1000$ metres are represented by $120$ cm.
$(1000\times 1000)$ sq.m are represented by $(120\times 120)$ sq.cm
$\therefore$ $1$ sq.m are represented by
$=\frac{120\times 120}{1000\times 1000}\times 10000$
$=144$ sq.cm