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Two people start at the same place and walk around a circular lake in opposite directions. One walks with an angular speed of 1.10 10-3 rad/s, while the other has an angular speed of 3.90 10-3 rad/s. How long will it be before they meet?

  • Physics -

    d1 + d2 = 2pi,
    (1.1*10^-3)t + (3.9*10^-3)t = 2pi,
    5*10^-3t = 2pi,
    t = 2pi/0.005 = 6.28/0.005 = 1256 s =
    20.9 min.

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