Tiles for a floor — Mensuration Aptitude Question
Tiles for a floor: How many square tiles of side 50 cm are needed to cover a floor measuring 8 m × 6 m? Answer and worked solution on CodeKairo.
- Topic: Mensuration
- Section: Quantitative Aptitude
- Difficulty: Medium
- Time target: 90 seconds
Question
How many square tiles of side 50 cm are needed to cover a floor measuring 8 m × 6 m?
Options
- 144
- 168
- 192
- 216
Show the answer and the worked solution
Correct answer: C. 192
Worked solution
- Floor area = 800 × 600 = 4,80,000 cm².
- Tile area = 50 × 50 = 2,500 cm².
- Tiles = 4,80,000 ÷ 2,500 = 192.
Answer: 192.
The idea
Convert to one unit before dividing. Counting tiles along each side works too: 16 across by 12 down gives the same 192.
Shortcut. Four 50 cm tiles fill one square metre, and the floor is 48 m², so 48 × 4 = 192.
Common trap. "144" — counting 12 tiles along both walls; 12 fits the 6 m side, but the 8 m side takes 16.