Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Average speed problem

  1. Jan 13, 2010 #1
    1. The problem statement, all variables and given/known data

    You jog at 9.5 km/hr for 8.0 km. You jump into a car and drive 16 km. What speed of the car do you need to cover a total distance of 24 km with an average speed of 22 km/hr

    2. Relevant equations

    3. The attempt at a solution
  2. jcsd
  3. Jan 13, 2010 #2


    User Avatar
    Homework Helper

    Average speed = Total distance/Total time.
    In the problem total distance and average speed. Find the total time.
    Find the jogging time. From that find the driving time.
    Driving distance is given. You can find the driving time. From that find the velocity of the car.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook