# Thread: Solving Word Problems With Equations

1. ## Solving Word Problems With Equations

Another word problem.

David flew 300km on a commuter plane, then 2000km on a passenger jet. The passenger jet flew twice as fast as the commuter plane. The total flying time for the journey was 3.25 hours. What was the speed of each plane, in kilometers per hour?

2. Originally Posted by larry21
Another word problem.

David flew 300km on a commuter plane, then 2000km on a passenger jet. The passenger jet flew twice as fast as the commuter plane. The total flying time for the journey was 3.25 hours. What was the speed of each plane, in kilometers per hour?

Remember $d=rt \iff t=\frac{d}{r}$
Let $r$ be the speed of the commuter plane then $2r$ is the speed of the jet then
$\frac{300}{r}+\frac{2000}{2r}=3.25$