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Applied Maths Question

  • 19-10-2012 10:53am
    #1
    aarond280
    Registered Users, Registered Users 2 Posts: 275 ✭✭


    Could someone answer this question thanks :)

    At 15.00 hours an aeroplane is 120km due east of a helicopter. The plane is flying in a diresction west 30' south at a constant speed of 800km/h. The Helicopter has a max speed of 40km/h.

    Find (a) the course for the closest aproach.
    (b) the time that this event occurs.

    Also another question:
    A man swims at 4ms^-1 in still water. He swims across a river of width 120 metres. The river flows with a constant speed of 5ms^-1 parallel to the straight banks.
    He wishes to cross by the shortest path.
    Find a the direction he should take
    b the time taken to cross the river by the shortest path.

    Thanks :cool:

    Just another question if two objects are to intercept what relationship is there ? :)


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