Algebra

posted by .

A carload of fraternity brothers leaves their house for a long weekend road trip. Two hours later a second carload of brothers leaves the same house and travels the same path. If the second car drives an average of 15 mph faster than the first, what is the average speed of each car if it takes the second car four hours to catch up to the first?

  • Algebra -

    we have two cars, Slow and Fast.
    f travels 4 hours at a speed of s+15

    distance = speed * time
    s*6 = (s+15)*4
    6s = 4s + 60
    2s = 60
    s = 30

    So,
    s goes 30mph for 6 hours = 180 miles
    f goes 45mph for 4 hours = 180 miles

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. math

    At 9:00 a.m. a truck leaves the truck yard and travels west at a rate of 45 mi/hr. Two hours later, a second truck leaves along the same route, traveling at 55 mi/hr. When will the second truck catch up to the first?
  2. Algebra

    A train leaves a city heading west and travels at 50 miles per hour. Three hours later, a second train leaves from the same place and travels in the same direction at 65 miles per hour. How long will it take for the second train to …
  3. Algebra 1

    a train leaves a city heading west and travels at 50 miles per hour. three hours later, a second train laeves from the same place and travels in the same directionat 65 per hour. how long will it take for the second train to overtake …
  4. Algebra 1

    A boat towing a water skier leaves a dock and travels east at a speed of 20mph. Two minutes later, a second boat towing another skier leaves the dock in the same direction at a speed of 25mph. How long will it take the second boat …
  5. math

    a carload of fraternity brothers leave their house for a long weekend trip. three hours later a second carload of brothers leaves the same house and travels the same path. if the second care drives and average of 15 mph faster than …
  6. algebra

    A train leaves Atlanta at 1:00 PM. A second train leaves the same city in the same direction at 5:00 PM. The second train travels 48 mph faster than the first. If the second train overtakes the first at 9:00 PM, what is the speed of …
  7. algebra

    A train leaves Atlanta at 1:00 PM. A second train leaves the same city in the same direction at 5:00 PM. The second train travels 48 mph faster than the first. If the second train overtakes the first at 9:00 PM, what is the speed of …
  8. algebra

    A train leaves Orlando at 3:00 PM. A second train leaves the same city in the same direction at 5:00 PM. The second train travels 20 mph faster than the first. If the second train overtakes the first at 10:00 PM, what is the speed …
  9. pre-algebra

    A train leaves New York at 1:00 PM. A second train leaves the same city in the same direction at 3:00 PM. The second train travels 28 mph faster than the first. If the second train overtakes the first at 6:00 PM, what is the speed …
  10. Algebra

    A car leaves a town at 80 kilometers per hour. A second car leaves one hour later. If the second car travels at 125 kilometers per hour, how long will it take the second car to catch up?

More Similar Questions