A gun is fired from a place which is at distance 1.2 km from a hill. The echo of the sound s heard back at the same place of firing after 8 second. Find the speed of sound.

A gun is fired from a place which is at distance 1.2 km from a hill. T

1.	A gun is fired from a place which is at distance 1.2 km from a hill. The echo of the sound s heard back at the same place of firing after 8 second. Find the speed of sound.
Answer» Solution :The echo will be heard when the sound reaches back at the place of FIRING. So, the TOTAL distance travelled by sound is `2xx1.2km=2.4km=2400m` SPEED `=(2400m)/(8s)=300ms^(-1)`