maths
posted by Sara .
a cyclist and jogger are 20 miles apart. the cyclist rides at 17 mph and the jogger runs at 7 mph. they move towards each other. a fly starts on the nose of the cyclist and flies at 20 mph from the cyclist to the runner and back. it continues back and forth until the cyclist and the jogger meet. How far has the fly travelled?

17t + 7t = 20 Miles
24t = 20
t = 20 / 24 = 0.83333 Hrs. to meet.
D = 20mi/h * 0.83333h = 16.7 Miles. =
Dist. traveled by fly.