Asked by carly

John is buying floor tile to put in a room that is 10 ft by 15 ft. He has chosen tiles that are 18 in by 18 in. Assuming that he needs to buy 10% extra to be safe, how many tiles would he need to buy.

I know that I need to buy enough for 150 square feet, but I'm not sure what my next step would be since that is in square feet and my tiles are in inches.
Answered by Ms. Sue
10/1.5 = 6.67 tiles
15/1.5 = 10 tiles

6.67 * 10 = 66.7

66.7 * 1.1 = 73.37 = 74 tiles

Answered by carly
What does the 1.5 represent that you divided by?
Answered by Ms. Sue
18 inches = 1.5 feet

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