Question

One of the 3. Two athlete's run clockwise on a circular track at constant (although different) speeds. athletes runs 5 laps/min and is in the inner most lane which is 30ft from the center of the circle. The second athlete runs 3 laps/min and is in the outer most lane that is 60 ft from the center point. How fast is the distance between the two runners changing when the first runner is in the 4 o'clock position and the other runner is in the 12 o'clock position?

Answer 1