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JAMB Mathematics 1983 Question 30

Question 30

Fractions, Decimals and Approximation

Correct each of the numbers 59.81798 and 0.0746829 to three significant figures and multiply them, giving your answer to three significant figures.

  1. A.4.46
  2. B.4.48
  3. C.4.47
  4. D.4.49
  5. E.4.50
Show the answer and explanation

Answer: C (4.47)

Explanation

59.81798 → 59.8 and 0.0746829 → 0.0747. Then 59.8 × 0.0747 = 4.46706, which is 4.47 to three significant figures.