Multiple choice

A train travelling at 54 km/h cross a signal poll in 36 second. find the time taken by it to cross a platform 180 meter long if its speed is reduced by 20%.

  1. 52 Second

  2. 48 Second

  3. 96 Second

  4. 72 Second

  5. None of these
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Train speed 54 km/h = 15 m/s. Length = speed×time = 15×36 = 540m. New speed after 20% reduction = 15×0.8 = 12 m/s. Platform length = 180m. Total distance = 540+180 = 720m. Time = 720/12 = 60 seconds. None of the options (52, 48, 96, 72) match 60 seconds.

Keep practicing — related questions