PF Kinematics BYU 1
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0In an announcement on a railway station, a passenger hears that the last train has passed the station t1 = 30 min earlier than his train. On the next station that is s = 20 km away from the previous station, in another announcement he hears that the first train arrived t2 = 20 min earlier than his train. Reading time from his watch, he calculates average speed of his train to be vp = 60 km/h. Relying on the announcement and the passenger's calculations, determine average speed of the first train.
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