The distance between two station A and B is 800 km. A train X starts from A and moves towards B at 40 km/h and another trains Y starts from B and moves towards A at 60 km/h. how far from A will they cross each other?
Show answer & explanation
Correct answer: B
Explanation
Correct Answer is option 2 i.e. 320 km
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Concept |
Understanding |
Application |
Fair calculation |
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When direction is opposite: Relative speed = x + y |
Speed of B = 60 km/h and Speed of A = 40 km/h Distance between two station A and B = 800 km |
Relative speed = (40 + 60) = 100 km/h A and B will meet each other in = 800/100 = 8 hrs Distance covered by A in 8 hrs = 8 × 40 = 320 km |
800/100 = 8
8 × 40 = 320 |