[amp_mcq option1=”30 m/sec” option2=”320 m/sec” option3=”332 m/sec” option4=”3,320 m/sec” correct=”option3″]
The velocity of sound in air (under normal condition) is 332 m/sec. This means that sound travels at a speed of 332 meters per second in air at a temperature of 20 degrees Celsius and a pressure of 1 atmosphere.
Option A is incorrect because the velocity of sound in air is not 30 m/sec.
Option B is incorrect because the velocity of sound in air is not 320 m/sec.
Option C is correct because the velocity of sound in air is 332 m/sec.
Option D is incorrect because the velocity of sound in air is not 3,320 m/sec.