Results 1 to 3 of 3
Like Tree1Thanks
  • 1 Post By HallsofIvy

Math Help - Not sure what to do with this problem (First post, by the way, Hi :)).

  1. #1
    Newbie
    Joined
    Apr 2013
    From
    Florida
    Posts
    2

    Not sure what to do with this problem (First post, by the way, Hi :)).

    Two airplanes leave an airport at the same time. The first flies at 200 km/h in a direction of 320 degrees from due north. The second flies at 150 km/h in a direction of -87 degrees from the positive x=axis. How far apart are the planes after 1 hr, 2 hr and 3 hr? If you join the airplanes' positions by a line segment, find the area they swept between them after 1 hr, 2 hr and 3 hr.
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor

    Joined
    Apr 2005
    Posts
    16,394
    Thanks
    1845

    Re: Not sure what to do with this problem (First post, by the way, Hi :)).

    The only "complication" here is that the directions are given in two different forms. "320 degrees from due north" I assume is measured clockwise (as on a compass) and so the angle between the two directions is 320- (90+ 87)= 143 degrees. After one hour, the first airplane will have flown 200 km and the second 150. So you have a triangle with two sides of length 200 km and 150 km and angle between them 143 degrees. You can use the 'cosine law" to find the third side of the triangle, the straight line distance between the two airplanes.
    Thanks from Oladapo
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Newbie
    Joined
    Apr 2013
    From
    Florida
    Posts
    2

    Re: Not sure what to do with this problem (First post, by the way, Hi :)).

    Thanks!
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Hello my first post!
    Posted in the New Users Forum
    Replies: 3
    Last Post: May 13th 2012, 02:54 AM
  2. interesting integral problem (from old post)
    Posted in the Calculus Forum
    Replies: 11
    Last Post: May 21st 2010, 11:20 AM
  3. Can I post mathematics related programming problem?
    Posted in the Advanced Applied Math Forum
    Replies: 0
    Last Post: March 17th 2010, 01:33 AM

Search Tags


/mathhelpforum @mathhelpforum