Question

The speed of sound in air is about 330 metre per second. How long will the sound take to travel 99 km?

Answer 1

Answer:

Answer:

Given,

Speed of Air = 330 ms-1

= > 330×60×60/1000

=> 1188 kmh-1

Taken Time = Distance / Speed

=> 99/ 1188

=> 1/12h

=> 1/12×60

=> 5 Min Ans

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Answer 2

Answer:

330 m is covered in 1 sec

Therefore, 99000 m is covered in

$\frac{1}{330} \times 99000$

$= 300$

Therefore, 99 km is covered in 300 sec= 300/60 min = 5 min