# A train P leaves Bareilly at 5 am and reaches Dehradun at 9 am. Another train Q leaves Dehradun at 7 am and...........

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A train P leaves Bareilly at 5 am and reaches Dehradun at 9 am. Another train Q leaves Dehradun at 7 am and reaches Bareilly at 10:30 am.
At what time do the two trains cross one another?

posted Jul 21, 2016

+1 vote

SUPPOSE THE DISTANCE BETWEEN STATIONS =140KM
HENCE SPEED OF P =140/4 IE 35KMPH
SPEED OF Q =140/3.5 IE 40 KMPH
AGAIN SUPPOSE P MEET Q AFTER X HOURS AND Q MEET P AFTER X+2 HOURS(Q MAKES JOURNEY 2 HOURS EARLIER)
DISTANCE TRAVELED BY P =35X KM
DISTANCE TRAVELED BY Q =40(X+2) KM
35X+40(X+2) =140
SOLVING X =60/75 HRS
=60/75X60 MIUTES
=48 MINUTES
HENCE THE TWO TRAIN CROSS AT =9.48AM

–1 vote

the two train cross one another at 8am.

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