Question

The cost of carpeting a room 15 m long with a carpet Rs. 75 cm wide, at Rs.70 per metre, is Rs. 8400.The width of the room is

(a) 9 m (b) 8 m (c) 6 m (d) 12 m

Answer 1

Here the area of carpet= area of room. ,

area of room=$l\times 0.75m^2$
let breadth=bm.
area of room=$15\times b{m}^2$
length of carpet=totalcost of carpenting/cost per meter
hence length of carpet=$\frac{3600}{300}$=120m.
hence $15\times b=120\times 0.75$
b=6m.