A 200 m long train is travelling at a constant speed of 20 m/s. How long will it take to completely cross a 1000 m long railway platform?
A1 minute ✓ Correct
B1.5 minutes
C2 minutes
D2.5 minutes
Correct answer: (A) 1 minute
Explanation
It takes 1 minute.
Total distance = train + platform = 200 + 1000 = 1200 m.
Speed = 20 m/s.
Time = 1200 / 20 = 60 s.
60 s = 1 minute.
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