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EEJ MAIN Aptitude QUESTION #10920
Question 1
A room measures 6 m × 4 m. Square tiles of side 40 cm are used. How many tiles are needed to cover the floor exactly, with no cutting?
  • 150✔️
  • 200
  • 300
  • 240
Correct Answer Explanation

Floor area = \(6 \times 4 = 24\ \text{m}^2 = 24 \times 10000 = 240000\ \text{cm}^2\

Tile area = \(40 \times 40 = 1600\ \text{cm}^2\

Number of tiles = \(\dfrac{240000}{1600} = 150\

Check: tiles along 6 m side = \(\dfrac{600}{40} = 15\, along 4 m side = \(\dfrac{400}{40} = 10\. Total = \(15 \times 10 = 150\ ✓