Two trains , each having a speed of 30km/h, are headed at each other on the same track.a bird flies off one train to another with a constant speed of 60 km / h. When they are 60 km apart till before they crash. Find the distance covered by the bird and how many trips the bird can make from one train to other before they crash.
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From the situation,
Recognizing that the gap between the trains is closing at a constant rate of 60 km/h ,the total time that elapses before they crash is t=(60km)/(60km/h)=1.0h.
During this time, the bird travels a distance of
x=vt=(60km/h)(1.0h)=60km.
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