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Bilal's room has a floor of 8m by 4m. He decides to tile the floor with tiles of 25cm x 20 cm. How many tiles will he need?

Correct answer: B. 640 tiles

  • A. 320 tiles
  • B. 640 tiles
  • C. 160 tiles
  • D. 6.4 tiles

Explanation

The floor area is 8 m x 4 m = 32 m². Each tile measures 0.25 m x 0.20 m, so its area is 0.05 m²; the number of tiles is 32 m² ÷ 0.05 m² = 640 tiles. Option a, 320 tiles, results from dividing by twice the tile area or covering only half the floor.

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