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two trains run at same speed = 90 km h^...

two trains run at same speed ` = 90 km h^(-1)` along a straight track one after another with a seperation d = 2 km . At the istant when they are located
smymetrically relative to the point A at a distance b = 1 km from the track , both emit ' a brief signal of frequency n = 500 Hz . what will be the nature of sound at A ? Speed of sound V = 350 m ` s^(-1)` .
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Text Solution

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The correct Answer is:
[ A beat tone of 50 Hz at A]
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