# physics

posted by
**argelia**
.

A runner is jogging at a steady 2.3 km/hr.

When the runner is 8.4 km from the finish

line, a bird begins flying from the runner to

the finish line at 9.2 km/hr (4 times as fast

as the runner). When the bird reaches the

finish line, it turns around and flies back to

the runner.

How far does the bird travel? Even though

the bird is a dodo, assume that it occupies

only one point in space (a “zero” length bird)

and that it can turn without loss of speed.

Answer in units of km