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Math Help - Distance between the two ships.

  1. #1
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    Distance between the two ships.

    English is not my first language and i don't seem to understand what it is asking or how the diagram should look. Can someone help me interpret and give me some advice?

    At noon, ship A passes the point P that is 8 km west of a harbour, heading due north at 8 km/h. At 10 a.m., ship B had left the harbour, sailing due north at 6 km/h.

    Give an expression for D, the distance between the two ships, in terms of t, the number of hours after noon.
    Last edited by mr fantastic; February 25th 2011 at 08:03 PM. Reason: Re-titled.
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  2. #2
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    Quote Originally Posted by ASUSpro View Post
    English is not my first language and i don't seem to understand what it is asking or how the diagram should look. Can someone help me interpret and give me some advice?

    At noon, ship A passes the point P that is 8 km west of a harbour, heading due north at 8 km/h. At 10 a.m., ship B had left the harbour, sailing due north at 6 km/h.

    Give an expression for dB, the distance between ship B and the harbour, in terms of t, the number of hours after noon.
    distance ship B north of the harbor ... d_B = 12 + 6t
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    sorry i meant the distance between the two, would it be
    c squared = a squared + bsquared

    c squared = 8^2 + (6t+12)^2 ? and isolate c?
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  4. #4
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    Quote Originally Posted by ASUSpro View Post
    sorry i meant the distance between the two, would it be
    c squared = a squared + bsquared

    c squared = 8^2 + (6t+12)^2 ? and isolate c?
    correction ...

    c^2 = [(6t+12)-8t]^2 + 8^2
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