A square tile has side 30cm. How many of these tiles will cover a rectangular floor of length 7.2m and width 4.2m?
Total floor area = 720 x 420
Area of one tile = 30 x 30
No. of tile required = \(\frac{720 \times 420}{30 \times 30}\)
= 24 x 14
= 336 tiles
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