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Two trains are moving in the same directions at speed of 43 km/h and 51 km/h respectively. The time taken by the faster train to cross a man sitting in the slower train is 72 seconds. What is the length (in metres) of the faster train?
  • a)
    160
  • b)
    138.4
  • c)
    170
  • d)
    140
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
Two trains are moving in the same directions at speed of 43 km/h and 5...
Given: The speed of 2 trains = 43 km/hr and 51 km/hr
Relative velocity of one train w.r.t. another = (51 - 43)km/hr = 8 km/hr
Relative velocity in m/s = 8 × (5/18) m/s
⇒ Distance covered by the train in 72 sec = 8 × (5/18) × 72 = 160
Since, this is the distance covered in crossing the man
Hence, the length of faster train = 160 m
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Two trains are moving in the same directions at speed of 43 km/h and 51 km/h respectively. The time taken by the faster train to cross a man sitting in the slower train is 72 seconds. What is the length (in metres) of the faster train?a)160b)138.4c)170d)140Correct answer is option 'A'. Can you explain this answer?
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