terry_96
Jul 11, 2008, 10:27 AM
A british Concorde (BC) and a French Concorde (FC) flew in opposite directions around the world, a distance of 40 000 km. The BC covered half of its flight distance at a supersonice speed of 2500 km/h and the other half at a subsonic speed of 1000 km/h. The FC spent half of its flight time at 2500 km/h and the other half at 1000 km/h. Which Concorde completed the trip first, and by how many hours did it beat the other? (SIN'76)
Answer: FC by 5.1 h
Answer: FC by 5.1 h