math

posted by .

My brother and I walk the same route to school every day. My brother takes 40 minutes to get to school and I take 30 minutes. Today, my brother left 8 minutes before I did. How long will it take me to catch up with him?

  • math -

    Let the distance to school S, my speed=S/30
    the speed of my brother=S/40 and
    I catch up with him after t min.
    Then
    S/40*(t+8)=S/30*t
    30t+240=40t

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Math

    Bill can mow his mothers lawn in 6 minutes. His brother Jim can mow it in 9 minutes. How long will it take them to do it together, if each has his own lawnmower?
  2. 6th grade math

    Mya works on Saturdays and then attends a study group. She needs to be home before her younger brother. She walks from work to the study group in 5 minutes. She studies for 40 minutes. She takes 5 minutes to walk to the bus stop. The …
  3. math

    How is this problem solved? It takes Bobby 60 minutes longer to wax the car than it does his brother Kevin. Together it takes them 50 minutes to wax the car. How long does it take each working separately?
  4. algebra

    How is this problem solved? It takes Bobby 60 minutes longer to wax the car than it does his brother Kevin. Together it takes them 50 minutes to wax the car. How long does it take each working separately?
  5. geometry

    hai takes 12 minutes to walk to school. he wants to get there 15 minutes early to meet with his lab partner. what time should he leave his house if school starts at 8:10am?
  6. Algebra

    Bill can mow his mother's lawn in 45 minutes. His brother Jim can mow it in 75 minutes. How long will it take them to do it together?
  7. math

    Bill can mow his mother's lawn in 45 minutes. His brother Jim can mow it in 65 minutes. How long will it take them to do it together, if each has his own lawnmower?
  8. Math

    1. What is the hypothesis of the following conditional statement?
  9. math

    trey can clean a room in 40 minutes. his brother Marcus can clean the same room in 20 minutes. how long will it take them to clean the room if they work together?
  10. math

    if Mindy has a 20 minute walk to school and she stops for a hotdog that takes 5 minutes to cook how long will it take for her to get to school?

More Similar Questions