The distance between two stations a and b is 280 km. One train at a speed of 80 kmph leaves station a at 6:00 pm towards station b. Another train at a speed of 120 kmph leaves station b at 7:00 pm towards station a. Then at what time both trains meet?
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Let say they meet T hr after 6 PM
Speed of 1st Train = 80 km/h
Distance by 1st train= 80*T km
Speed of 2nd Train = 120 km/h
Distance by 2nd Train = 120*(T-1) ( as train leave (7-6=1hr) later
Distance covered by both train = 280 km
80T + 120(T-1) = 280
80T + 120T - 120 = 280
200T = 400
T = 2 Hr
6+2 = 8 PM
Train meets at 8 PM
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