A tiles measure 12cm *10 cm .How many tiles will be required to cover a wall of size 4m*3m also?Find the total cost of the tiles a t 22.50 rupees per tiles?
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area for covering tiles =area of walls /area of tiles
=400×300/12×10
=120000/120
=1000cmsq
Cost of tiles =22.5×1000
=22500
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