SOLUTION: Summer drove at an average speed of 35 mi/h from her home in Dallas to visit her sister in Minneapolis. She stayed in Minneapolis 20 hours, and on the trip back averaged 45 mi/h. S

Question 700832: Summer drove at an average speed of 35 mi/h from her home in Dallas to visit her sister in Minneapolis. She stayed in Minneapolis 20 hours, and on the trip back averaged 45 mi/h. She returned home 50 hours after leaving. How many miles is Dallas from Minneapolis?
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
Summer drove at an average speed of 35 mi/h from her home in Dallas to visit her sister in Minneapolis.
She stayed in Minneapolis 20 hours, and on the trip back averaged 45 mi/h.
She returned home 50 hours after leaving.
How many miles is Dallas from Minneapolis?
:
Actual travel time: 50-20 = 30 hrs
:
Let d = one way dist
:
Write a time equation, time = dist/speed
+ = 30
multiply by 315 to clear the denominators
9d + 7d = 315(30)
16d = 9450
d = 9450/16
d = 590.6 mi one way (Actually it's almost twice that)
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