A room is 4.5m long and 4 m wide. The floor of the room is to be covered with tiles of size 15cm by 10cm. Find the cost of covering the floor with tiles at the rate of Rs.4.50 per tile.
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Solution
Given, Length of room =4.5m and breadth of room =4m
So, Area of room =4.5×4=18m2
Area of room =18×(10000cm2)=180000cm2
Size of tiles =(15cm×10cm)
So, Area of tile one =15×10=150cm2
So, number of tiles required to cover the floor=Area of floorArea of one tile