The aircraft A with radar detection equipment is flying horizontally at an altitude of 13.5 km and is increasing its speed at the rate of 1.85 m/s each second. Its radar locks onto an aircraft B flying in the same direction and in the same vertical plane at an altitude of 18.5 km. If A has a speed of 1010 km/h at the instant when 0 = 40°, determine the values of r and Ö at this same instant if B has a constant speed of 1690 km/h.