SOLUTION: Rocco wants to calculate the cost of covering the floor of his family room with tile. The floor measures 15 feet 5 inches by 12 feet 6 inches. He chooses rectangular tiles that a

Question 1107296: Rocco wants to calculate the cost of covering the floor of his family room with tile. The floor measures 15 feet 5 inches by 12 feet 6 inches. He chooses rectangular tiles that are 12� by 18�. A box of 20 tiles costs $70.00. How many boxes must Rocco buy? What is the total cost?
Answer by rothauserc(4718) (Show Source): You can put this solution on YOUR website!
(15 * 12) + 5 = 185 inches
:
(12 * 12) + 6 = 150 inches
:
Area of floor is 185 * 150 = 27750 square inches
:
Area of one tile is 12 * 18 = 216 square inches
:
Number of tiles needed is 27750/216 = 128.47 approximately 129 tiles
:
A box contains 20 tiles, therefore we need 129/20 = 6.45 approximately 7 boxes
:
Rocco must buy 7 boxes at a cost of 70 * 7 = $490
:

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