Single correct · +4 / −1

The speed of sound in air at 20°C is approximately:

  1. (a) 300 m/s
  2. (b) 343 m/s
  3. (c) 500 m/s
  4. (d) 3× 10⁸ m/s
Answer and solution

Answer (b) 343 m/s

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