The least number of square tiles that will be needed to pave a plot 225 m by 30 m is ______.

30 tiles

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15 tiles

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25 tiles

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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 = $\frac{Area of plot}{Area of 1 tile}$ = $\frac{225 \times 30}{15 \times 15}$ = 30

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The least number of square tiles that will be needed to pave a plot 225 m by 30 m is ______.

The correct option is B 30 tilesLargest length of side of square tile is the HCF of 225 and 30.∴ HCF = 15Number of tiles required = Area of plotArea of 1 tile = 225×3015×15 = 30

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 = $\frac{Area of plot}{Area of 1 tile}$ = $\frac{225 \times 30}{15 \times 15}$ = 30