1. The problem statement, all variables and given/known data Both Concords are going 40 000 km. The British Concorde spends half its DISTANCE at 2500 km/hr, and the other half at 1000 km/hr. The French Concorde spends half it's TIME at 2500 km/hr, and the other half at 1000 km/ hr. Which one arrived at their destination first? 2. Relevant equations d=vt 3. The attempt at a solution I can do the calculations for the British Concorde, to find time, but I can't quite figure out how to do the calculations for the French Concorde. Please help? The only thing I can think of is this: 1/2t=40 000km/2500 km/hr for the first half of the time Which is 16 hours, and then: 1/2t=40 000 km/1000 km/hr Which is 40 hours What I can't figure out, is whether to divide them both by 1/2 then add, or just add them together. Help?