Question
Download Solution PDFTwo trains of lengths 250 metres and 400 metres are running at speeds of 40 km/h and 30 km/h, respectively. If they are moving in the same direction, they will cross each other in ________ minutes.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFGiven:
Length of first train = 250 m
Length of second train = 400 m
Speed of first train = 40 km/h
Speed of second train = 30 km/h
Concept:
Time = Distance / Speed.
The distance is the sum of the lengths of the two trains and the speed is the difference in the speeds of the two trains.
Solution:
Time = (Length of first train + Length of second train)/(Speed of first train - Speed of second train)
⇒ Time = (250 m + 400 m)/(40 km/h - 30 km/h)
⇒ Time = 650 m/10 km/h (convert the speed to m/min and time to minutes)
⇒ Time = 3.9 minutes
Therefore, the two trains will cross each other in 3.9 minutes.
Last updated on Jun 30, 2025
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