Question

The sound of an explosion on the surface of lake is heard by a boatman 100m away and a driver 100m below the point of explosion.(i) explain who will hear the sound of explosion first(ii) if the sound takes t s to reach the man how much time will it take to reach the driver?

Answer 1

1) first to the driver because sound travels faster in air compared to water.
2) time=340ms^-1 / 100m
=3.4 s