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Posted by on Tuesday, March 15, 2011 at 2:40am.

Two cyclists depart from the same point. One travels due East at 18km/hr while the other travels North-West at 20km/hr. How long will it be before they are 80km apart?

  • Maths - , Tuesday, March 15, 2011 at 9:06am

    80^2=t^2(20^2+18^2)

    solve for time t.

  • Maths - , Tuesday, March 15, 2011 at 9:31am

    Wonderful, thank you

  • Maths - , Friday, October 28, 2016 at 1:32am

    Two cyclists leave a park and ride in opposite directions, one averaging 5 mph and the other 10 mph. If they have two-way radios with a 10-mile range, for how many minutes will they remain in radio contact?

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