Question

The speed of sound is 330 m/sec Express this in km/hr, how long the sound take to travel
30 km​

Answer 1

Step-by-step explanation:

$1m \s \: = 18 \div 5kmph \\ so \: 18 \div 5 \times 330 = 1188kmph$

Now d=30

S=1188kmph

t=d/s=30/1188 hrs

hope you understand ❤️