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JAMB Physics 2011 Question 31

Question 31

Sound

A cannon is fired from town X. After how long is the sound heard at a town Y 4.95 km away? [Velocity of sound in air = 330ms−1]

  1. A.12s
  2. B.15s
  3. C.30s
  4. D.10s
Show the answer and explanation

Answer: B (15s)

Explanation

Time = distance ÷ speed = 4950 ÷ 330 = 15 s.