﻿ Two trains, one coming towards and another going away from an observer both at 4 m/s produce a whistle simultaneously of frequency 300 Hz. Find the number of beats produced? : Kaysons Education

# Two Trains, One Coming Towards And Another Going Away From An Observer Both At 4 M/s Produce A Whistle Simultaneously Of Frequency 300 Hz. Find The Number Of Beats Produced?

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## Question

### Solution

Correct option is

7

For coming train,

.

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