A kitchen wall, measuring 4.5 m in length and 2.8 m in height, needs to be tiled. The tiles are rectangular, 30 cm × 20 cm. If an additional 8% of tiles are required to account for errors and cuts, how many tiles should be purchased?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 227.
Wall area = 4.5 × 2.8 = 12.6 m2 = 126000 cm2
Tile area = 30 × 20 = 600 cm2
Tiles needed = 126000/600 = 210
Extra 8% = 210 × 0.08 = 16.8
Total tiles = 210 + 16.8 = 226.8 ≈ 227