A car cut the distance between saskatoon and calgary in 6 hours. The car has tires with an outside diameter of 80cm. Find the angles through which...

A car cut the distance between saskatoon and calgary in 6 hours. The car has tires with an outside diameter of 80cm. Find the angles through which the car's tire turn in (a) 5.6 seconds and (b) 1.15 minutes (the distance between saskatoon and calgary is 600 Km)