2 guns were fired from same place at an interval of 28 minutes,But a man sitting in the train approaching the place heare the 2nd firing 26 min after 1st if the speed of sound is 325m/sec find the speed of train?
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Let the speed of the train be x m/sec. Then distance traveled by train in 10 min = Distance traveled by sound in 30 sec.
⇒x×10×60=330×30
⇒x=
10×60
330×30
=16.5
∴ Speed of the train =16.5 m/sec =16.5×
5
18
=59.4 km/hr.
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