Two trains of equal length take 6 sec and 8 sec respectively to cross a pole If the length of each t...........

Quantitative Aptitude (CDS) Problems on trains

Two trains of equal length take 6 sec and 8 sec respectively to cross a pole. If the length of each train is 144 meters, in what time (in second) will they cross each other traveling in the opposite direction?

8.6sec

7.5sec

7sec

6.8sec

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Explanation:

Speed of first train = (144/6)m/sec

= 24m/sec

Speed of second train =(144/8) m/sec
= 18 m/sec

Relative speed = (24+18) = 42m/sec

Required time = (144 + 144)/42 sec = 6.8sec