Question

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 ?

Answer 1

first train journey period was 4hrs
second train journey period was 3hrs 30 min
I think they would meet at 8am

Answer 2

Thank you for asking this question. Here is your answer:

First of all we will suppose that the trains met at t hrs after 7 am

x is distance between Delhi and Meerut.

Then we will solve it with the following formula:

(x/3.5)*t + (x/4)*(t+2)=x

or  

t/3.5 + (t+2)/4 =1

So, t= 7/7.5 hrs or 56 mins.

Which means that the trains will meet at 7.56 AM

If there is any confusion please leave a comment below.