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Q: Speed of sound waves is 700ms⁻¹. How long time will the waves take to travel 7 km ?
  • A. 10 seconds
  • B. 100 seconds
  • C. 50 seconds
  • D. 5 seconds
Correct Answer: Option A - Wave speed (v) = 700 ms ⁻¹ Distance covered by the wave is 7 km = 7000m Time = distance / speed Time = 7000/700 Time = 10 seconds
A. Wave speed (v) = 700 ms ⁻¹ Distance covered by the wave is 7 km = 7000m Time = distance / speed Time = 7000/700 Time = 10 seconds

Explanations:

Wave speed (v) = 700 ms ⁻¹ Distance covered by the wave is 7 km = 7000m Time = distance / speed Time = 7000/700 Time = 10 seconds