∵ X can reach Y’s house in 25 minutes ∴ Y can reach X’s house in 50 minutes X and Y are running towards each other. It will be reach the middle of houses ∴ Time of X=
25
2
= 12.5 minutes and Time of Y =
50
2
=25 minutes More time by Y = 25 minutes – 12.5 minutes = 12.5 minutes.