SOLUTION: Fiora starts riding her bike at 20 mph, then slows down to 12 mph. The whole trip of 70 miles takes her 4.5 hours. For what distance does she travel at 20 mph?

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Question 1052537: Fiora starts riding her bike at 20 mph, then slows down to 12 mph. The whole trip of 70 miles takes her 4.5 hours. For what distance does she travel at 20 mph?
Found 2 solutions by Alan3354, MathTherapy:
Answer by Alan3354(69443)   (Show Source): You can put this solution on YOUR website!
Fiora starts riding her bike at 20 mph, then slows down to 12 mph. The whole trip of 70 miles takes her 4.5 hours. For what distance does she travel at 20 mph?
----
d = r*t
--
t = hours at 20 mi/hr
---
20t + 12*(4.5 - t) = 70
8t = 16
t = 2 hours
---
d @ 20 mi/hr = 20*2 = 40 miles
-------------
40/20 + 30/12 = 4.5 hours
Answer by MathTherapy(10552)   (Show Source): You can put this solution on YOUR website!

Fiora starts riding her bike at 20 mph, then slows down to 12 mph. The whole trip of 70 miles takes her 4.5 hours. For what distance does she travel at 20 mph? 
With D as distance traveled at 20 mph, we get the following TIME equation: 

Solve for D. 

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