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SSC CGL 2020 PYQ — Question 27

SSC CGL - 7th March 2020 Shift 3 • General Awareness • Q27

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What is the velocity of sound in the air?

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Correct answer: A

Explanation

The correct answer is option 1 i.e 343 m/sec.

  • The speed of sound is the distance travelled per unit of time by a sound wave as it propagates through an elastic medium.
  • At 20 °C (68 °F), the speed of sound in the air is about 343 metres per second or a kilometre in 2.9 s or a mile in 4.7 s.
  • It depends strongly on temperature as well as the medium through which a sound wave is propagating.