SOLUTION: Stephanie goes on a five hour cycle ride. Her average speed for the while ride is 28km/hr. her average speed for the first four hours of her ride was 30km/hr. what was her average

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Question 1105741: Stephanie goes on a five hour cycle ride. Her average speed for the while ride is 28km/hr. her average speed for the first four hours of her ride was 30km/hr. what was her average speed for the last hour of her ride?
Found 2 solutions by Alan3354, rothauserc:
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
Stephanie goes on a five hour cycle ride. Her average speed for the while ride is 28km/hr. her average speed for the first four hours of her ride was 30km/hr. what was her average speed for the last hour of her ride?
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5*28 = 140 km total
4*30 = 120 km in 4 hours.
Can you do the rest?

Answer by rothauserc(4718) About Me  (Show Source):
You can put this solution on YOUR website!
Stephanie's bike ride covered 5 * 28 = 140 km
:
(4 * 30) + (1 * x) = 140
:
120 + x = 140
:
x = 20
:
Stephanie averaged 20 km/hr over the last hour
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