The cost of carpeting a room 18 m long with a carpet 75 cm wide at Rs. 4.50 per metre is Rs. 810. The breadth of the room is :
Length of the carpet = ` ((Total cost)/(Rate // m)) = (8100/45)` m = 180 m
Area of the room = Area of the carpet = `(180 xx 75/100) m^2 = 135 m^2`
`:.` Breadth of the room = (Area / Length) = ` (135/18) m = 7.5 m`
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