Question
Tristan is laying 12" x 18" tiles on the lab floor. If the lab measures 15 feet by 18 feet, how many tiles does Tristan need, assuning there's no waste.
Answers
Reiny
The lab would measure
180 inches by 216 inches
case 1: longer side of tile along longer side of floor
216/18 = 12
180/12 =15
number of tiles = 12x15 = 180
case 2: shorter side of tile along the longer side of floor
216/12 = 18
180/18 = 10
number of tiles = 10x18 = 180
Of course we had to get the same answer, since division was exact either way, thus no waste
other way:
area of 1 tile = 12" by 18"
= 1ft by 1.5 ft
= 1.5 ft^2
area of floor = 15(18) or 270 ft^2
number of tiles = 270/1.5 = 180
180 inches by 216 inches
case 1: longer side of tile along longer side of floor
216/18 = 12
180/12 =15
number of tiles = 12x15 = 180
case 2: shorter side of tile along the longer side of floor
216/12 = 18
180/18 = 10
number of tiles = 10x18 = 180
Of course we had to get the same answer, since division was exact either way, thus no waste
other way:
area of 1 tile = 12" by 18"
= 1ft by 1.5 ft
= 1.5 ft^2
area of floor = 15(18) or 270 ft^2
number of tiles = 270/1.5 = 180