Multiple choice

A train crosses a platform 100 m long in 60 sec at a speed of 45 km/hr. The time taken by the train to cross an electric pole is

  1. 8 sec

  2. 52 sec

  3. 1 min

  4. Data Inadequate
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Speed = (45 ´ 5/18) m/sec = (25/2) m/sec Let the length of the train be x meters Then , (x + 100 )/(25/2) = 60, x = 650 m Time taken by the train to cross an electric pole = (650 ´ 2/25) = 52 sec

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