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JAMB Mathematics 1987 Question 2

Question 2

Fractions, Decimals and Approximation

Find the length of a rod which can be cut into exactly equal strips, each of either 40cm or 48cm in length

  1. A.120cm
  2. B.240cm
  3. C.360cm
  4. D.480cm
Show the answer and explanation

Answer: B (240cm)

Explanation

The rod must be a multiple of both 40 and 48. The smallest such length is the LCM of 40 and 48, which is 240cm.