A man standing 25 m away from a wall produces a sound and receives the reflected sound.
Calculate the time after which he receives the reflected sound if the speed of sound in air is 350 m `s^(-1)`.

Explanation

To solve the problem of calculating the time after which a man receives the reflected sound from a wall, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Distance**: The man is standing 25 meters away from the wall. When he produces a sound, it travels to the wall and then reflects back to him. Therefore, the total distance the sound travels is twice the distance to the wall.

\[
\text{Total distance} = 2 \times \text{Distance to the wall} = 2 \times 25 \, \text{m} = 50 \, \text{m}
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