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4800 tiles

3*3=9 (area of tiles) 12*12=144 (width in inches)

12*25=300 (length in inches)

144*300=43200 (area of room)

43200/9=4800 (area of room over area of tiles)

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Q: How many 3 inch tiles are needed for a room 12 feet wide and 25 feet long?
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