1. The problem statement, all variables and given/known data The human beings are standing at equal distances from a big and high wall. Distance between them is 150 m. When one fires the gun the other hears two shots in an interval of 2 seconds, using the speed of sound to be 340.298 m/s calculate their distance to the wall. 2. Relevant equations V=x/t 3. The attempt at a solution I dont know what two shots mean, i thought it means the sound is reflected from the wall, so i calculated time to reach girl 2 to girl 1 to be 0.44s subtractes from 2s and got 1.55s. Taking the time from guy1 to wall and wall to guy2 to be 1.55/2 i calculated distance to be 260m but thats not even close. What is wrong?