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the answer for this is

2100 x 2 pie = 4200 pie radian

3 mins = 180 seconds

4200 / 180 = 73.3 rad/s

(ii) Determine the area and arc length of the minor sector shown here for the 120mm diameter circle.

minor section angle = pie / 3 x radians (this question is formatted as pie with a line under it then 3 under the line and radians next to it so i am presuming that i have to x it)

i know how to work out everything apart from the minor section angle i just dont know what it means by radians can any one help me out i would realy appreciate it?