Station A and Station B were 70 miles apart. At 13:36, a bus set off from Station A to Station B at an average speed of 25 mph. At 14:00, another bus set off from Station B to Station A at a constant speed of 35 mph buses pass each other at what time ?

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Answer 1 · 2018-01-20T12:26:05

The buses pass each other at #15:00# hrs.

Time interval between #14:00 and 13:36 =24# minutes

#=24/60=2/5# hour. The bus from station A advanced in #2/5#

hour is # 25*2/5=10# miles. So bus from station A and from

station B are #d=70-10=60# miles apart at #14:00# hrs.

Relative speed between them is #s=25+35=60# miles per hour.

They will take time #t=d/s=60/60=1# hour when they pass

each other. Hence the buses pass each other at

#14:00+1:;00=15:00# hrs [Ans]