SOLUTION: what is the answer to katrina rode her bike aup a mountain at an average of 4mph. Then she rode back down at an average speed of 20mph. the entire trip took 3 hours. How far up the

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Question 369846: what is the answer to katrina rode her bike aup a mountain at an average of 4mph. Then she rode back down at an average speed of 20mph. the entire trip took 3 hours. How far up the mountain did katrina go?
Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
the distance is the same (up and down)
___ total time is 3 hr

t = d / r

(d / 4) + (d / 20) = 3

5d + d = 60