This topic needs to extend the concept of angle to any positive angle. The ray OA starts from 0 and rotates counterclockwise to a certain position, that is, how many degrees the position is called, for example, (3)OB is 40 and OC is 1 10,

At t, OP is 1 10+5t, and OQ is 40 +5t.

Om divides the ∠POQ equally,

So OM is (110+5t+40+5t)/2 = 75+5t,

In equal shares ∠POA,

The analogy is (110+5t)/2 = 55+2.5t,

So ∠ mon = 75+5t-(55+2.5t) = 20+2.5t = 40,

The solution is t=8 (minutes).

Is it okay?