Results 1 to 2 of 2

Thread: Velocity

  1. #1
    Sep 2007


    Two trains each 440 feet long, run towards each other on parallel lines at the same uniform velocity. They meet and pass each other in seven and half seconds.
    What is the velocity of each train in miles per hour?

    Trains have to pass each other length. But two trains with same speed, pass each other at the same time. So how could I calculate this?
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Senior Member Educated's Avatar
    Aug 2010
    New Zealand
    $\displaystyle \text{velocity} = \text{distance} \div \text{time}$

    Since the 2 trains are heading towards eachother, the velocity solved will be double of a single train.
    2 trains are 880 feet long.

    $\displaystyle 2 \times \text{velocity} = 880 \text{ft} \div 7.5 \text{seconds}$

    In short, the 2 trains combined velocities cancel out the extra distance of both trains.

    $\displaystyle \text{velocity} = 440 \text{ft} \div 7.5 \text{seconds}$
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Replies: 0
    Last Post: Feb 23rd 2011, 09:17 AM
  2. Replies: 3
    Last Post: Feb 20th 2010, 06:21 PM
  3. Replies: 2
    Last Post: Sep 21st 2009, 02:32 PM
  4. velocity
    Posted in the Calculus Forum
    Replies: 1
    Last Post: Sep 14th 2008, 08:12 AM
  5. [SOLVED] Can the average velocity and delta velocity ever be the same?
    Posted in the Advanced Applied Math Forum
    Replies: 9
    Last Post: Sep 28th 2007, 04:24 AM

Search tags for this page

Search Tags

/mathhelpforum @mathhelpforum