Posted by Matt on Saturday, July 13, 2013 at 12:20pm.
A family drove 1080 miles to their vacation lodge. Because of increased traffic density, their average speed on the return trip was decreased by 6 miles per hour and the trip took 2.5 hours longer. Determine their average speed on the way to the lodge.

College Algebra  Steve, Saturday, July 13, 2013 at 7:14pm
since time = distance/speed,
1080/s + 5/2 = 1080/(s6)
s = 54
So, speed out = 54, sped back = 48
2160/(1080/54 + 1080/48) = 50.8 mph avg speed
Answer This Question
Related Questions
 math  A family drove 1080 miles to their vacation lodge. Because of increased ...
 math  A family drove 1080 miles to their vacation lodge. Because of increased ...
 algebra  diana drove 320 miles, then increased her speed by 10 miles per hour ...
 college Algebra  James drove the 24 miles to two and back in hour. On the ...
 math  Hannah took a trip yo visit her cousin. She drove 120 miles to reach her ...
 math  andys average driving speed for a 4hour trip was 45 miles per hour. ...
 Algebra  Austin drove to the mountains last weekend. There was heavy traffic on...
 math  Mark averaged 60 miles per hour during the 30mile trip to college. ...
 Math  On a trip of d miles to another city, a truck driver's average speed was ...
 College Algebra  A truck driver traveled at an average speed of 55 miles per ...
More Related Questions