Asked by Jenn
Jen recently rode her bicycle to visit her friend who lives 12 miles away. On her way there, her average speed was 10 miles per hour faster than on her way home. If Jen spent a total of 1 hour bicycling, find the two rates.
Answers
Answered by
Steve
since time = speed * distance, then if her outbound speed was x, then
12/x + 12/(x-10) = 1
x = 30 or 4
Check: 12/30 + 12/20 = (24+36)/60 = 1
The other solution to the equation is x=4. Why is that not useful?
12/x + 12/(x-10) = 1
x = 30 or 4
Check: 12/30 + 12/20 = (24+36)/60 = 1
The other solution to the equation is x=4. Why is that not useful?
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