We know that: .A person shoots at a barrel.
Two seconds later he hears the bullet hit the barrel.
The speed of sound is 340m/s and the average speed of the bullet is 650m/s.
What is the distance between the shooter and the barrel?
Let = distance from the shooter to the barrel (in meters).
. . At 650 m/s, the bullet takes: . seconds to reach the barrel.
. . At 340 m/s, the sound takes: . seconds to reach the shooter.
Since the total time is 2 seconds, we have: .
. . Now solve for . . .