The cost of preparing the four walls of a room 75 paise per square meter is Rs- 240- The height of the room is 5 meters- Find the length and the breadth of the room- they are in the ratio 5-3-

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The cost of preparing the four walls of a room at 75 paise per square meter is Rs. 240. The height of the room is 5 meters. Find the length and the breadth of the room, if they are in the ratio 5:3.

The cost of preparing the four walls of a room at $75$ paise per square meter is $R s . 240$ . The height of the room is $5$ meters. Find the length and the breadth of the room, if they are in the ratio $5 : 3$ .