physics help

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An auto race is held on a circular track. A car completes one lap in a time of 16.9 s, with an average tangential speed of 48.1 m/s. Find the following

(a) the average angular speed

(b) the radius of the track

i found part a which was .3716 but need help with part b please

  • physics help -

    one lap in 16.9s? That is 2PI radians/16.9s which is the angular speed.
    b. angularspeed*radius= tangential speed, find radius.

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