SOLUTION: mary drove 138 miles one way to visit her mother which took 2 1/2 hours.The return trip took 3 1/4 hours due to more traffic.what was her average speed for the entire trip?

Question 806728: mary drove 138 miles one way to visit her mother which took 2 1/2 hours.The return trip took 3 1/4 hours due to more traffic.what was her average speed for the entire trip?
Found 2 solutions by solver91311, richwmiller:
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!

Average speed is total distance divided by total time, so 2 times 138 divided by 2.5 plus 3.25

John

Egw to Beta kai to Sigma
My calculator said it, I believe it, that settles it

Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
276/(2.5+3.25)=276/5.75 =48 mph average for trip
55.2 to
42.46 return
RELATED QUESTIONS
mary drove 138 miles one way to visit her mother which took 2 1/2 hours. The return trip... (answered by ankor@dixie-net.com)
Wendy was traveling from Baltimore, MD to Cleveland, OH. For the first 2 3/4 hours of... (answered by josgarithmetic)
you are traveling 250 miles round trip. it takes you 3 hours to get to your point and on... (answered by ankor@dixie-net.com)
melba drove accross the state to visit her family. she drove 600 miles, which took her... (answered by Alan3354)
Patrick drove 3 hours to attend a meeting. On the return trip his spped was 10 miles per... (answered by solver91311)
If Patrick drove 3 hours to attend a meeting. On the return trip, his speed was 10 miles... (answered by josgarithmetic)
I drove to my parents' house 600 miles away. My mother worried that I drove too fast, so... (answered by fcabanski)
mia drove her car at the rate of 60 mph from her home to los angeles. her mother made the (answered by josgarithmetic,MathTherapy)
A family drove 1080 miles to their vacation lodge. Bercause of increased traffic... (answered by RAY100)