Antony leaves Kingstown at 2:00 P.M. and drives to Queensville, 256 km distant, at 72 km/h. At 2:15 P.M. Helen leaves Queensville and drives to Kingstown at 64 km/h. At what time do they pass each other on the road?

at 2:15, Antony has gone72/4 = 18 km.

So the total distance to cover is now only 238km
so it will take 238/(72+64) = 1.75 hr to meet
That makes it 4:00