Question

find the distance between the surface and source of sound, if speed is 334m/s and echo returns from surface in 1.5s.

Answer 1

speed=334m/s
time=1.5s

as it is an echo situation,
speed=(2 x distance) / time
therefore, dist=(speed x time)/2
                      =(334 x 1.5)/2
                       =250.5m

dist=250.5m