Question
Download Solution PDFTrain A leaves the station with uniform speed at a certain time. After 2 hours, train B leaves the station and moves in the same direction with uniform speed of 75 km/h. Train B crosses train A in 4 hours. The relative speed of the two trains is:
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept used:
Speed = Distance/Time
Calculation:
Let's assume that the speed of train A = x km/hr
Now, for the 1st 2 hours, the train travelled 2x km
Now, train B moves in same direction speed of 75 km/hr, so relative speed of train A and B is = (75 - x)
Now, according to the question,
(75 - x) × 4 = 2x
⇒ 300 - 4x = 2x
⇒ 6x = 300
⇒ x = 50
So, speed of train A = 50 km/hr, then relative speed of train A and B is (75 - 50) = 25 km/hr
∴ The correct answer is 25 km/hr
Last updated on May 28, 2025
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