Question

the speed of sound is approximately 1.2*10^3 km/h. how long does it take for sound to travel 7.2*10 km? write your answer in minutes.

Answer 1

Given:

The speed of the sound is

To find the time for sound to travel 7.2*10 km

Speed = distance over the time

So, time will be the distance over the speed

so, the time will be:

`t=(7.2\cdot10)/(1.2\cdot10^3)=6\cdot10^(-2)hr=0.06hr`

Now, convert from hours to minutes

1 hour = 60 minutes

so, the time will be:

`t=0.06\cdot60=3.6\min`

So, the answer will be: time = 3.6 minutes