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Train with the speed of 45 m/s cross the person standing on platform in 20 sec. How much time it will take to cross the platform which is 1.5 times larger than the train?
  • a)
    50 seconds 
  • b)
    75 seconds
  • c)
    1 min
  • d)
    0.2 min
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
Train with the speed of 45 m/s cross the person standing on platform i...
Speed of train = 45 m/s
Time taken to cross the person = 20 second
Speed of train = distance travelled/time taken
⇒ 45 = Distance travelled/20
⇒ Distance travelled = length of train = 900 m
Length of platform = 1.5 × length of train = 1.5 × 900 = 1350 m
∴ Time taken to cross the platform = (900 + 1350)/45 = 50 seconds
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Train with the speed of 45 m/s cross the person standing on platform in 20 sec. How much time it will take to cross the platform which is 1.5 times larger than the train?a)50 secondsb)75 secondsc)1 mind)0.2 minCorrect answer is option 'A'. Can you explain this answer?
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