A train approaching a hill at a speed of 40 km hr sounds a whistle...
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A train approaching a hill at a speed of 40 km hr sounds a whistle of frequency 580 Hz when it is at a distance of 1 km from hill A wind with a speed of 40 km hr is blowing in the direction of motion of the train Find the frequency of the whistle as heard by an observer on the hill Velocity of sound in air 1 200 km hr Question Type Single Correct Type 1 599 Hz 2 699 Hz 3 499 Hz 4 799 Hz
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