Results 1 to 5 of 5

Thread: what is the average speed ?

  1. #1
    Contributing Member
    Join Date
    Sep 2006
    Answers
    962

    what is the average speed ?

    A plane maintains an average speed of 285mph from London to New York. It then returns from New York to London at an average speed of 76mph. What is the average speed for the entire journey?

    -------------------
    suresh


  2. #2
    Moderator
    Join Date
    Sep 2006
    Answers
    920

    Re: what is the average speed ?

    120 is the answer?

    Regards,
    Brijesh Jain
    ---------------------------------------------------------
    Connect with me on Skype: jainbrijesh
    Google Plus : jainbrijeshji

  3. #3
    Contributing Member
    Join Date
    Sep 2006
    Answers
    962

    Re: what is the average speed ?

    Yes jainbrijesh.....Plz leave your solution...

    ------------------
    suresh


  4. #4
    Moderator
    Join Date
    Sep 2006
    Answers
    920

    Re: what is the average speed ?

    let distance=d,
    av.speed1=v1=285
    time=t1,
    d=285*t1

    here again distance=d
    av. speed2=v2=76
    time=t2
    d=76*t2

    now: 285*t1=76*t2
    t2=(285/76)*t1

    Now av. speed=2d/(t1+t2)

    solve it and get the answer 120.

    Last edited by jainbrijesh; 01-04-2007 at 12:49 AM.
    Regards,
    Brijesh Jain
    ---------------------------------------------------------
    Connect with me on Skype: jainbrijesh
    Google Plus : jainbrijeshji

  5. #5
    Contributing Member
    Join Date
    Sep 2006
    Answers
    962

    Re: what is the average speed ?

    Very Good Explanation buddy.....

    Keep it up.....

    ----------------
    suresh


  6.  Sponsored Ads
    Ad


     

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
About us
Applying for a job can be a stressful and frustrating experience, especially for someone who has never done it before. Considering that you are competing for the position with a at least a dozen other applicants, it is imperative that you thoroughly prepare for the job interview, in order to stand a good chance of getting hired. That's where GeekInterview can help.
Interact