A train 280 m long is moving at a speed of 60 km/hr. The time taken by the train to cross a platform 220 m long is?

20 sec
25 sec
30 sec
35 sec

Correct Answer: 30 sec

Explanation:

Distance covered = 220 + 280 = 500 = 0.5 km
Speed = 60 kmph.
Time taken = 0.5 / 60 hr = (0.5 x 60 x 60)/60 sec
= 30 sec

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