SOLUTION: Riding mostly downhill, Joan rode her ten-speed bicycle to the state fair in 1.5 h. It took 4.2 h to make the return trip, since her average speed was 36 km/h less than her average

Question 1089353: Riding mostly downhill, Joan rode her ten-speed bicycle to the state fair in 1.5 h. It took 4.2 h to make the return trip, since her average speed was 36 km/h less than her average speed on the way tot he fair. Find her average speed in each direction.
Answer by josgarithmetic(39625) (Show Source): You can put this solution on YOUR website!

             SPEED       TIME      DISTANCE
DOWNHL        r          1.5        d
UPHILL       r-36        4.2        d

----downhill
-----uphill
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