A bus is moving towards a gauge wall with a velocity of `5m//s^(-1)`. The driver sounds a horn of frequency `200 Hz`. The frequency of the beats heard by a passenger of the bus will be ………… `Hz` (Speed of sound in air `= 342m//s^(-1))`

Explanation

To solve the problem, we need to determine the frequency of the sound heard by a passenger in the bus when the bus is moving towards a wall while sounding a horn. We will use the Doppler effect formula for sound.

### Step 1: Identify the given values
- Velocity of the bus (source), \( v_s = 5 \, \text{m/s} \)
- Frequency of the horn (source frequency), \( f_s = 200 \, \text{Hz} \)
- Speed of sound in air, \( v = 342 \, \text{m/s} \)

### Step 2: Calculate the frequency of the sound heard by the wall
...