Multiple choice

Tiles of (1.5 \times 2) meter dimension in the rectangular hall of (20 \times 15) meter square have been laid. 20% of the total tiles are blue, remaining 30% tiles are of yellow color and rest of the 50% tiles are of red color and the remaining tiles are white. What is the area covered by white tiles?

  1. $56 m2$
  2. $60 m2$
  3. $120 m2$
  4. $84 m2$

  5. None of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Hall area = 20 × 15 = 300 m². Each tile = 1.5 × 2 = 3 m². Total tiles = 300/3 = 100. Blue tiles = 20% of 100 = 20. Yellow tiles = 30% of remaining 80 = 24. Red tiles = 50% of remaining 56 = 28. White tiles = remaining = 56 - 28 = 28. White tile area = 28 × 3 = 84 m², which is option D.

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