In a room 18 meters long, using a carpet 75 cm wide, the cost of carpeting is Rs. 810 at the rate of Rs 4.50 per meter. The width of the room is -

Explanation

Given- Length of the room = 18 meters Carpet laying rate = Rs. 4.50 per meter, total cost = Rs. 810 ∴ Length of the Carpet = $\frac{total cost}{carpet laying rate} = \frac{810}{4.50}$ = 180 meters Area of room = Area of carpet ∴ Width of the room = $\frac{180 m \times 75 cm}{18 m}$ = $10 \times 75 cm$ = 7.5m