18. The floor of a bathroom with dimensions 3m x 2.4 m, is to be paved with tiles of dimensions 15 cm x 12 cm. Find, (i) How many tiles are required? (ii) What is the cost of paving at the rate of 200 per tile?
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18. The floor of a bathroom with dimensions 3m x 2.4 m, is to be paved with tiles of dimensions 15 cm x 12 cm. Find, (i) How many tiles are required? (ii) What is the cost of paving at the rate of 200 per tile?
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Length of the floor=18m=18X100=1800cm
Breadth of the floor=15m=15X100=1500cm
Area of the floor =l X b=1800 cm X 1500 cm
Area of the tile =side X side=30cm X cm
total number of tiles=Area of the floor/Area of the tile
Number of tiles =(1800 cm X 1500 cm)/ (30 cm X 30 cm)=3000 tiles
Cost of one tile = Rs 2.50
Total cost of 3000 tiles = Rs 2.50 X 3000 =Rs 7500
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