Physics
posted by Rose on .
A speedy tortoise can run at .01 meters per second, and the hare can run 21 times as fast. I. A race they start at the same time, but the hare stops for 1.5 minutes so the tortoise wins by a shell(20cm).
How long is the race?
How long is the path?

Let T be the duration of the race (seconds) and X be the distance traveled to the finish line (cm).
1* T = X (distance traveled by tortoise)
21(T  90) = X  20 (distance traveled by hare)
First eliminate X by substitution.
21 T  1890 = T  20
20 T = 1870
T = 93.5 seconds
X = T = 93.5 cm