minute. 16 Two cyclists A and B leave X simultaneously at 120 to one another, with constant speeds of 12 ms and 16 ms . respectively. Find the rate at which the distance between them is changing after 2 minutes. 17 [AB] is a fixed diameter of a circle of radius 5 cm. Point P moves around the circle at a constant rate of 1 revolution in 10 seconds. Find the rate at which the distance AP is changing at the instant when: AP = 5 cm and increasing b P is at B. attached to a