A rectangular room measures 8 m long and 6 m wide. Its floor is to be covered with square tiles of side 40 cm. If 10% extra tiles are purchased for cutting and breakage, how many tiles are needed in total?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 330.
Room area = 8 × 6 = 48 m2 = 480000 cm2
Tile area = 40 × 40 = 1600 cm2
Tiles needed = 480000/1600 = 300
Extra 10% = 300 × 10/100 = 30
Total = 300 + 30 = 330