A 320 metre long train crosses a pole in 16 seconds It stops five times of duration 18 minutes each ...........

Quantitative Aptitude ( CCS) Problems on trains

A 320 metre long train crosses . a pole in 16 seconds. It stops five times of duration 18 minutes each. What time will it take in covering a distance of 576 km?

9 hours

37/4hours

19/2hours

17/2 hours

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Explanation:

Speed of train = (Length of train)/(Time taken incrossing)
= 320/16 = 20 m/sec.
= 20 × 18/5 = 72 kmph
Total period of stoppage = 5 × 18 = 90 minutes = 3/2 hours
Total time taken in covering a distance of 576 km
= (576/72 + 3/2) hours
= 8 + 3/2 = 19/2 hours