Multiple choice

What is the cost of painting the walls of a rectangular room? I. Length, breadth and height of the room are in the ratio 3 : 2 : 1. II. Length of the room is equal to the side of the square whose area is 2304 m2 and cost of painting the walls is Rs. 85 per sq. m. III. Breadth of the room is equal to the height of the triangle whose base is 8 m. and area is 128 m2 and cost of painting the walls is Rs. 85 per sq. m.

  1. I and II

  2. I and III

  3. Only III

  4. I and either II or III

  5. Any two of the three
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Statement I gives the ratio but not actual dimensions. Statement II gives length via square area and painting rate. Statement III gives breadth via triangle area and repeats painting rate. We need I plus either II or III to get all dimensions and cost information.

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