Train A which is 320m long can cross a pole in 16 seconds If It halts 5 times each time for exactly ...........

Quantitative Aptitude ( CCS) Problems on trains

Train A which is 320m long can cross a pole in 16 seconds. If It halts 5 times each time for exactly 18 minutes, how many hours will it take to cover a distance of 57 kms? (in hours)

21/2

17/2

19/2

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Explanation:

Speed of train =(Length of train)/(Time taken in crossing)
= 320/16 = 20 m/sec.
= (20 × 18/5) kmph = 72
∴ Time spent in haltage = 5 × 18
= 90 minutes = 3/52 hours
∴ Total time taken in covering 576 km.
= (576/72 + 3/2) hours
= 19/2 hours