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Question 108
Two trains 125 metres and 115 metres in length, are running towards each other on parallel lines, one at the rate of 33 km/hr and the other at 39 km/ hr. How much time (in seconds) will they take to pass each other from the moment they meet ?
Solution
length of first train and 2nd train is given as 125 m and 115 m respectively and the speed of train with length 125 m and 115 m is 33km/hr and 39km/hr respectively .
Total length = 115+125= 240m
Relative speed = 33 + 39 = 72 km/hr = 72 $$\frac{5}{18}$$ = 20m/s
Using Distance = Speed x Time
Time to cross each other = $$\frac{240}{20}$$ = 12 sec
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