Question

A room is $13m$ long and $9m$ wide. Find the cost of carpeting the room with a carpet $75cm$ wide at $Rs.12.50$ per meter.

Answer 1

Length of carpet required$=\frac{areaofroom}{widthofcarpet}$

$=\frac{13\times 9}{75}\times 100m$

$=13\times 12m$

$=156m$

$\therefore$ Cost $=12.50\times 156$

$=\frac{25\times 156}{2}=\frac{100\times 156}{8}=\frac{15600}{8}$

= Rs. $1950$