The least number of square tiles that will be needed to pave a plot 225 m by 30 m is ______.
A
30 tiles
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B
15 tiles
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C
25 tiles
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D
45 tiles
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Solution
The correct option is B 30 tiles Largest length of side of square tile is the HCF of 225 and 30. ∴ HCF = 15 Number of tiles required = Area of plotArea of 1 tile = 225×3015×15 = 30