Plane A and Plane B flew in opposite directions around the Earth (40,000 km).
Plane A covered half its distance at a speed of 2,500 km/h and the other half at a speed of 1,000 km/h.
Plane B spent half its time at 2,500km/h and the other half at 1,000 km/h.
How long did it take each plane to complete the flight.
Ok so I found the time of Plane A, half the distance being 20,000 km if i'm correct.
Therefore Plane A took 28 Hours.
Problem is i have no idea how to tell how long it took Plane B. Any help please.