Question

How many metres of carpet $75cm$ wide will be required to cover the floor of a room which is $20$ metres long and $12$ metres broad?

Answer 1

Area of the carpet
$=$ area of the floor of the room
$=20\times 12$ sq.m.
$=240$ sq.m.
Width of the carpet $=75cm=\frac{3}{4}m$
$\therefore$ Length of the carpet $=\frac{Area}{Width}$
$=\frac{240}{\frac{3}{4}}$
$=320$ metres