# The speed of sound in the air is 340 m / s. calculate the distance to the obstacle reflecting

March 29, 2021 | education

| **The speed of sound in the air is 340 m / s. calculate the distance to the obstacle reflecting the sound if it is known that the tourists heard the echo after 8 seconds.**

To find the required distance to the obstacle, we will use the equality: 2L = S (common path of sound) = V * t, whence we express: L = V * t / 2.

Values of constants and variables: V – speed of sound in air (V = 340 m / s); t is the total time of sound movement (t = 8 s).

Let’s make a calculation: L = V * t / 2 = 340 * 8/2 = 1360 m.

Answer: The distance between tourists and the obstacle is 1360 m.

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