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22 November, 02:16

Jin ran 400 yards around a track with a circumference of 420pi yards. How many radians did he cover?

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  1. 22 November, 02:43
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    420pi = 2pi*r

    r = 210yards

    Radius length when wrapped around circle is 1 Radian, so ...

    He ran 400yards

    Radians covered = 400/210

    He covered 1.9 radians
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