From two airfields, two planes flew towards each other at the same time, one flying at a speed of 630 km / h

From two airfields, two planes flew towards each other at the same time, one flying at a speed of 630 km / h, and the other at 650 km / h. In how many hours will they meet if the distance between the airfields is 3840 km?

Let us determine with what speed the planes were approaching, if it is known that they were heading towards each other, while the speed of one of them was 630 kilometers per hour, and the speed of the other was 650 kilometers per hour.
650 + 630 = 1280 kilometers per hour.
Let us determine how long it will take until the aircraft meet, if it is known that the airfields are at a distance of 3840 kilometers from one another.
3840: 1280 = 3 hours.
Answer: the planes will meet in 3 hours.