Question
Distance between two stations βPβ and βQβ is 620
km. Train A starts from βPβ at 8:30 a.m. with the speed of 32 km/hr. and train B starts from βQβ towards βPβ at 9 a.m. with the speed of 38 km/hr. What will be the distance between both trains at 11:30 p.m.?Solution
Distance travelled by train A in 30 min = 32/2 = 16 km Therefore, the remaining distance = 620 β 16 = 604 km Relative speed of the trains = 32 + 38 = 70 km/hr. Time = 11:30 p.m. β 9:00 a.m. = 5/2 hrs. Distance covered by both the trains = 70 Γ 5/2 = 175 km Distance between both the trains at 11:30 p.m. = 604 β 175 = 429 km
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