Multiple choice

What is the total cost of painting the four walls of arectangular room?Statement I: The total area of the four walls is 120 squaremetres.Statement II: The height of the room is 5 metres.Statement III: The cost of painting is 25 per square metre.

  1. a.Only I and II are sufficient.

  2. b. Only II and III are sufficient.

  3. c. Only I and III are sufficient.

  4. d. All I, II, and III are sufficient.

  5. e. Neither I, II, and III are sufficient.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

To find the total cost, you need the total area (Statement I) and the cost per square metre (Statement III). The height (Statement II) is redundant because the total area is already provided.

AI explanation

To find the total cost of painting the four walls, you need the total wall area and the cost per square meter. Statement I provides the total wall area as 120 square meters, and Statement III provides the rate as 25 per square meter. Multiplying 120 by 25 gives the total cost of 3000, so only Statement I and Statement III are required.

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