Distance = 403 km
Relative speed of the buses = 60 + 64 =124 km/hr
Time taken = Distance / speed = 403/124 = 3.25 hrs
Two buses will meet after 3.25 hours of departure.
Distance covered by the bus moving from delhi = 60x3.25 = 195 km
So both busses will meet at 195 km from delhi.