Question

Velocity of sound at A particular place is 400metre per second then calculate the minimum distance between the source of sound and the obstacle for an echo to take place

Answer 1

Answer:

the source of sound is 0.1 so ,

400 m/s x 0.1 = 40

Answer 2

Answer:

speed=total distance/total Time

400m =total distance /0.1s

400×0.1=total distance

40m =total distance

Distance between source and reflecting body=40/0.1

400 m