SOLUTION: An SAA plane and a BA flight take off at the same time from points that are 1 275 km apart. They fly in a direct route towards each other. They cross at x hours. If the BA plane f

Algebra ->  Linear-equations -> SOLUTION: An SAA plane and a BA flight take off at the same time from points that are 1 275 km apart. They fly in a direct route towards each other. They cross at x hours. If the BA plane f      Log On


   

Question 1041911: An SAA plane and a BA flight take off at the same time from points that are 1 275 km apart. They fly in a direct route towards each other. They cross at x hours.
If the BA plane flies 225 km/h, how far will it fly in x hours? 225 x km
If the SAA plane flies 200 km/h, how far will it fly in x hours? 200 x km
What expression expresses the relation between the results of ‘a’ and ‘b’ and the 1275 km? 200x = 225x = 1275
Solve this equation and find how long it takes SAA and BA planes to cross flight paths.
Answer by jorel555(1290) About Me  (Show Source):
You can put this solution on YOUR website!
When they cross flight paths, assuming they meet each other, then you add velocities:
225n+200n=1275
425n=1275
n=3
They cross flight-paths in 3 hours. ☺☺☺☺