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A train leaves Meerut at 5 a.m. and reaches Delhi at 9 a.m. Another train leaves Delhi at 7 a.m. and reaches Meerut at 10.30 a.m. At what time do the two trains travel in order to cross each other ?

6:56 am
8:58 am
7:56 am
4:54 am
Explanation:

Let the total distance be x


So the speed of 1st train is x/4 and 2nd train x/3.5


In 2 hours 1st train covers half of the total distance .


So remaining is only half of the total distance(ie x/2).


Let t be the time taken


$d\dfrac{t\times x}{4}$ +$ \dfrac{t\times x}{3.5}$ = $\dfrac{x}{2}$


t=$\dfrac{14}{15}$ i.e. 56 min


i.e. Total time taken= 2 hrs + 56 min


Time they cross each other is 7:56 am (5+2.56)


Answer 7:56 am


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