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A train 150 m long crosses a platform 250 m long in 20 seconds. How much time will it take to cross a signal pole at the same speed?

2697Hard UPSC Principal Vice Principal 0 replies 2 views
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A train 150 m long crosses a platform 250 m long in 20 seconds. How much time will it take to cross a signal pole at the same speed?

  • A6 s
  • B7.5 s
  • C8 s
  • D10 s
Correct answer: B

Explanation

Speed = 400 / 20 = 20 m/s. Time to cross the pole = 150 / 20 = 7.5 s.

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