find the cost of carpeting a room 12m long and 9m wide at the rate of ₹85 per
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Area of the room = lb = 12 × 9 = 108 m²
For 1 m², cost is ₹85
For 108 m², cost is 108 × 85 = ₹ 9180
Cost of carpeting the room is ₹ 9180
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