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/(s-6)

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 ...
- mathh - 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 ...
- math - Mark averaged 60 miles per hour during the 30-mile trip to college. ...
- College Algebra - A truck driver traveled at an average speed of 55 miles per ...
- math - Hannah took a trip yo visit her cousin. She drove 120 miles to reach her ...
- math - andys average driving speed for a 4-hour trip was 45 miles per hour. ...
- math - A truck drove 1400 miles at a rate twenty miles per hour slower on the ...
- Algebra - A truck driver traveled at an average speed of 58 miles per hour on a ...
- College Algebra - A truck driver traveled at an average speed of 55 miles per ...