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A man standing 300m away from the wall sounds a whistle. The echo from the...

Physics
WAEC 1991
A man standing 300m away from the wall sounds a whistle. The echo from the wall reaches him 1.8sec. later, calculate the velocity of sound in air
  • A. 540.0ms-1
  • B. 333.3ms-1
  • C. 270.0ms-1
  • D. 166.7ms-1
  • E. 83.3ms-1
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Correct Answer: Option B
Explanation
V = \(\frac{2x}{t} = \frac{2 \times 300}{1.8}\)


= 333.33ms-1
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