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Two trains move towards each other with ...

Two trains move towards each other with same speed. Speed of sound is `340 m//s`. If the pitch of the tone of the whistle of one train when heard on the other train changes to `9//8` times, then the speed of each train is :

A

`2 ms^(-1)`

B

`40 ms^(-1)`

C

`20 ms^(-1)`

D

`100 ms^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
C
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