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

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) (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?
--------------
5*28 = 140 km total
4*30 = 120 km in 4 hours.
Can you do the rest?

Answer by rothauserc(4718) (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
:

RELATED QUESTIONS
During a charity ride Sally and Ruth each cycle 120 km. Ruth�s average speed for the... (answered by josmiceli)
If a bicyclist rides at 10 miles per hour for 10 minutes, and then speeds up to 20 miles... (answered by Alan3354)
In a half hour, Sarah is meeting her friends at the lake, 6 mi from her house. At what... (answered by ikleyn)
Jane took three hours to drive to her friend's home on the weekend. Her average speed was (answered by ptaylor)
Two cyclists ride along a circular path whose circumference is 10 km. The two cyclists... (answered by ankor@dixie-net.com)
Laura rode her bicycle at 15 miles per hour for 2 hours , and then 12 miles per hour for... (answered by macston)
If you are on a bike trip and you ride 5 miles in the first 30 minutes and then you ride... (answered by josgarithmetic)
If I am riding a bike in the country and I ride 6 kilometers the first hour, 3 kilometers (answered by checkley77)
you ride on a train for 175 miles at an average speed of 50 miles per hour. how many... (answered by rfer)