math

posted by .

11. Runner A crosses the starting line of a marathon and runs at an average pace of 5.6 miles per hour. Half an hour later, Runner B crosses the starting line and runs at an average rate of 6.4 miles per hour. If the length of the marathon is 26.2 miles, which runner will finish ahead of the other? Explain

  • math -

    runner A runs 5.6 miles/hr so it will take him 4.68 hrs to run the marathon.

    runner B runs 6.4 miles/hr so it will take 4.09 hrs to run the marathon

    however runner B started half and hour later than runner A 4.68 - .5 = 4.18

    so runner B will finish the marathon .09hrs before runner A

  • math -

    running time of faster runner = 26.2/6.4 or 4.125 hours or 4:7.5
    running time of slower runner = 26.2/5.6 or 4.67857 hours or 4:40.7

    remember the faster runner started 30 minutes later, so what do you think?

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Math

    Runner A crosses the starting line of a marathon and runs at an average pace of 5.6 miles per hour. Half an hour later, Runner B crosses the starting line and runs at an average rate of 6.4 miles per hour. If the length of the marathon …
  2. Physics

    Please help! I don't know how to solve these problems! 1 A runner dashes from the starting line (x = 0) to a point 130 m away and then turns around and runs to a point 11 m away from the starting point in 21 seconds. To the nearest …
  3. Please Help, Physics

    1 A runner dashes from the starting line (x = 0) to a point 130 m away and then turns around and runs to a point 11 m away from the starting point in 21 seconds. To the nearest tenth of a m/s what is the average speed?
  4. physics

    A runner dashes from the starting line (x = 0) to a point 80 m away and then turns around and runs to a point 39 m away from the starting point in 23 seconds.What is the runner's average velocity in the previous problem?
  5. Math

    Solve the problem. Round to the nearest tenth, if necessary. A long-distance runner runs 5 miles directly south and then faces due east and runs another 7 miles. How far is the runner, in a straight line, from his starting point?
  6. Math

    Runner A crosses the starting line of a marathon and runs at an average pace of 5.6 miles per hour. Half an hour later, Runner B crosses the starting line and runs at an average rate of 6.4 miles per hour. If the length of the marathon …
  7. physics

    A runner dashes from the starting line (x=0) to a point 134 m away and then turns around and runs to a point 26 m away from the starting point in 16.8 seconds. To the nearest tenth of a m/s what is the average speed?
  8. physics

    A runner dashes from the starting line (x = 0) to a point 127 m away and then turns around and runs to a point 38 m away from the starting point in 13 seconds. To the nearest tenth of a m/s what is the average speed?
  9. algebra word problem

    A long distance runner starts at the beginning of a trail and runs at a rate of 5 miles per hour. One hour later, a cyclist starts at the beginning of the trail and travels at a rate of 13 miles per hour. What is the amount of time …
  10. 10

    A runner is at the starting gate and hears the starting gun. He begins running with a constant acceleration ai = 0.55 m/s2. He crosses the finish line at d = 100 m and then begins slowing down. It takes him tr to cross the finish line. …

More Similar Questions