locomotive approaching a crossiing at a speed of 80miles/hr,sounds a whistle of frequency 400HZ when 1 mile from the crossing.There is no wind,and the speed of the sound in air is 0.200miles/sec.what frequency is heard by an observer 0.60miles from the crossing on the straight road which crosses the rail road at right angles
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Becaus because it have large tributaries like penganga ,vanganga.It size is large 1500km
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Answer:442Hz
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