Multiple choice

In each of the following question a question is followed by three statements. Study the question and the statements and decide the information given in which of the statements (s) is/are necessary to answer the question? Find out the cost of a painting at the rate of Rs. 5.50 per square meter of 16 m. long square room? (I) The width of the room is 15 m. (II) The height of the room is 12 m. (III) The total area of the door and window is 60 m².

  1. Only II

  2. All I, II and III

  3. Only I and II

  4. Only II and III

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

To find the painting cost, we need the total wall area minus door/window area. Wall area = 2 × length × height + 2 × width × height = 2(16×12) + 2(15×12) = 384 + 360 = 744 m². Paintable area = 744 - 60 = 684 m². Cost = 684 × 5.50 = Rs. 3762. All three statements I, II, and III are necessary - length and width to calculate perimeter, height for wall dimensions, and door/window area for deductions.

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