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JAMB Mathematics 1982 Question 26

Question 26

Ratio, Percentages and Rates

Express 130 kilometres per second in metres per hour.

  1. A.7.8 × 105
  2. B.468 × 106
  3. C.7,800,000
  4. D.4.68 × 106
  5. E.780 × 10-6.
Show the answer and explanation

Answer: B (468 × 106)

Explanation

130km/s = 130 000m/s, and an hour has 3600 seconds: 130 000 × 3600 = 468 000 000 = 468 × 10⁶ m per hour.