A runner is jogging at a steady vr =
3:8 km=hr. When the runner is L = 5:1 km
from the finish line, a bird begins flying
from the runner to the finish line at vb =
11:4 km=hr (3 times as fast as the runner).
When the bird reaches the finish line, it turns
around and flies back to the runner. Even
though the bird is a dodo, we will assume
that it occupies only one point in space, i.e., a
zero length bird.
How far does the bird travel? Answer in
units of km.
I'm way lost here. So far, I figure when the bird reaches the finish line, the bird will have traveled 5.1km while the human will have traveled 1.7km, leaving him 3.4km from the finish. I don't know where to go from here though, it seems like guess and check is the only way but I know that's not it
*edit* Ehh should've put this in high school math, my bad :\