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JAMB Mathematics 2006 Question 46

Question 46

Commercial Arithmetic

The cost of renovating a 6m square room is N540. What is the cost of renovating a 9m square room?

  1. A.N1,215
  2. B.N720
  3. C.N1,620
  4. D.N810
Show the answer and explanation

Answer: A (N1,215)

Explanation

A 6m square room has area 36m2 (N15 per m2); a 9m square room has area 81m2, so the cost is 81 × N15 = N1,215.