College Algebra

posted by .

A truck driver traveled at an average speed of 55 miles per hour on a 200 mile trip to pick up a load of freight. On the return trip(with the truck fully loaded), the average speed was 40miles per hour. What was the average speed for the round trip?

  • College Algebra -

    Average speed = total distance traveled/total time taken

    time for first leg of trip =200/55 hrs
    time for second leg of trip = 200/40 hours

    so average speed = 400/(200/55 + 200/40)
    =46.3 mph

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. calculus

    Suppose that the cost of operating a truck in Mexico is cents per mile when the truck runs at a steady speed of v miles per hour. The top speed of the truck is 100 mph. Assume that the driver is paid 10 dollars per hour to drive the …
  2. math

    a truck driver traveled at an average speed of 48 miles per hour on a 100-mile trip to pick up a load of freight. On the return trip with the truck fully loaded,the average speed was 40 miles per hour. Find the average speed for the …
  3. college algebra

    a bus driver wants to average at least 40 miles per hour on a 70 mile trip. if the first 35 miles takes the driver 1 hour what should be the lowest average speed for the second 35 miles?
  4. Algebra

    A truck driver traveled at an average speed of 58 miles per hour on a 200-mile trip to pick up a load of freight. On the return trip (with the truck fully loaded), the average speed was 37 miles per hour. Find the average speed for …
  5. math

    Mark averaged 60 miles per hour during the 30-mile trip to college. Because of heavy traffic he was able to average only 40 miles per hour during the return trip. What was Mark's average speed for the round trip?
  6. Calculus/ Optimization

    A truck driver, on assignment from the owner of the truck is to drive on a 300 mile stretch of highway at a constant speed of v miles per hour. According to road signs, the minimum speed allowed is 55 miles per hour and the speed limit …
  7. Math/ Calculus Please HELP!!!

    A truck driver, on assignment from the owner of the truck is to drive on a 300 mile stretch of highway at a constant speed of v miles per hour. According to road signs, the minimum speed allowed is 55 miles per hour and the speed limit …
  8. College Algebra

    A truck driver traveled at an average speed of 55 miles per hour on a 200-mile trip pick up a load of freight. On the return trip (with the truck fully loaded), the average speed was 40 miles per hour. What was the average speed for …
  9. college Algebra

    James drove the 24 miles to two and back in hour. On the return trip, he was able to average 20 miles per hour faster than he averaged on the trip to town. what was his average speed on the trip to town?
  10. Math

    On a trip of d miles to another city, a truck driver's average speed was x miles per hour. On the return trip the average speed was y miles per hour. The average speed for the round trip was 50 miles per hour. Show that y=25x/(x-25) …

More Similar Questions