Kate runs twice the rate she paddles. She bikes 8 km/hr faster than she runs and skis 7 km/hr faster than she paddles. How fast does she ski?
The quadrathlon consists of a 10 km ski, a 8 km run, a 8 km paddle, and a 20 km bike ride.
When she completed the course, Kate noticed that her total time running and paddling was exactly the same as her total time skiing and biking.
So far have figured out the following equations:
2p = r
r+8 = b
p+7 = s
r+p = s+b