From (1) we get that train leaving from station A takes 2 hours to reach station B.

But We are not given the speed of the trains leaving station B.

Therefore Time taken for Train to reach from station A to B = ? .

Not SUfficientFrom (2) it's Exactly the opposite of Option (1). Hence

Not Sufficient

Combining (1) and(2) we get the Time taken by train to travel from each side and hence no of Oncoming trains can be calculated.

SufficientP.S: Since this is a DS question we don't have to get the exact number

Hope This Helps

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Thanks

Sindbad

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