SOLUTION: Peter travels to his uncles home, 30km away from his place.he cylcles for two thirds of the journey before the bicycle develops mechanical and he has to push it for the rest of the

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Question 1133694: Peter travels to his uncles home, 30km away from his place.he cylcles for two thirds of the journey before the bicycle develops mechanical and he has to push it for the rest of the journey.if his cycling speed is 10km/hr than his walking speed and he completes the journey in 3hours 20minutes , determine his cycle speed.
Answer by josgarithmetic(39621) About Me  (Show Source):
You can put this solution on YOUR website!
                 SPEEDS         TIMES           DISTANCE
All Cycling       r             20/r              20
Walking           r-10          10/(r-10)         10
TOTAL                            3&1/3            30

highlight_green%2820%2Fr%2B10%2F%28r-10%29=3%261%2F3%29------solve for r.