Question 1046964
It took Debbie 5.4 hours to drive hours to her mothers house on Wednesday morning. On her return trip on Thursday night, traffic was heavier, so the trip took her 6 hours. Her average speed on Thursday was 4mph slower than Wednesday. What was her average speed on Thursday?
--------------
r = speed going
r-4 = speed returning
-----
The distance is the same.
d = 5.4r = 6(r-4)
Solve for r