1. The problem statement, all variables and given/known data The time it takes a high frequency sound to travel from the surface of the lake to the bottom of the lake and back to the surface is 0.1seconds. What is the depth of the lake? 2. Relevant equations Speed of sound in water= 1500m/s Time=0.1s Depth=? 3. The attempt at a solution Depth= Speed of sound * time elapsed/2= 1500*0.1/2 = 75m IS THIS CORRECT? PLEASE HELP?