A marble tile measure 18cm×12cm. how many tiles will be required to cover a wall of size 9m×24m? Also find the total cost of the tiles at the rate of Rs2.75 per tiles.
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Area of wall=900cm×2400cm
Area of tile=18cm×12cm
Number of tiles=(900cm×2400cm)/18cm×12cm=1000
Total cost=1000×2.75=Rs2750
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