Two trains of lengths 110 m and 90 m are running on parallel tracks at 45 km hr and 50 km hr respect...........

Quantitative Aptitude ( CCS) Problems on trains

Two trains of lengths 110 m and 90 m are running on parallel tracks at 45 km/hr and 50 km/hr respectively. In what time will they pass each other?

18seconds

72 seconds

36 seconds

144 seconds

Distance to be covered is 110 + 90 = 200 m.

Relative speed is 50 – 45 = 5 km/hr = 5 × 5/18 = 25/18 m/s.

So time required = 200/(25/18) = 144 sec.

Hence, option 4 is the correct answer.

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