Problema Solution
A rectangular room measures 12 feet by 15 feet. The entire room is to be covered with rectangular tiles that measure 3 inches by 2 inches. If the tiles are sold at ten for 30 cents, what will it cost to tile the room?
Answer provided by our tutors
1 ft = 12 in
12 ft = 12*12 = 144 in
15 ft = 15*12 = 180 in
the area of the room in in^2 is: 144*180 = 25920 in^2
the area of one tile is: 3*2 = 6 in^2
the total number of tiles needed is: 25920/6 = 4320 tiles
10 tiles cost 30 cents
let 4320 tiles cost x cents
we have the following proportion
10 : 30 = 4320 : x
by solving we find
x = 12960 cents = $129.60
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it will cost $129.6 to tile the room.