Two trains are travelling towards each other both at a speed of `90 km h^-1`. If one of the trains sounds a whistle at 500 Hz, w

Two trains are travelling towards each other both at a speed of `90 km h^-1`. If one of the trains sounds a whistle at 500 Hz, what will be the apparent frequency heard in the other train ? Speed of sound in air `= 350 m s^-1.

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Two trains are travelling towards each other both at a speed of `90 km h^-1`. If one of the trains sounds a whistle at 500 Hz, what will be the appare

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