SOLUTION: Jenny walks 5 kilometers from her house to Star SuperMall to buy a new bike which she uses to return home. She averaged 10 kilometers faster on her bike than on foot. If her to

Question 1042314: Jenny walks 5 kilometers from
her house to Star SuperMall to buy a new bike
which she uses to return home. She averaged 10
kilometers faster on her bike than on foot. If her
total trip took 1 hour and 20 minutes, what is her
walking speed in kph? Use the formula v = d/t .
Explain Briefly
Answer by josgarithmetic(39625) (Show Source): You can put this solution on YOUR website!

           RATE      TIME           DISTANCE
WALK        r         t               5
RIDE       r+10                5
TOTAL

ALTERNATIVE ATTEMPT AT ARRANGING DATA

            RATE       TIME        DISTANCE
WALK         r          x           5
RIDE        r+10        y           5
TOTAL                


From which you can modify to 
-
            RATE       TIME        DISTANCE
WALK         r                     5
RIDE        r+10                   5
TOTAL

And this allows time sum equation

You can decide which way is best or easier, and then solve.
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