Science:Math Exam Resources/Courses/MATH100/December 2018/Question 06/Statement

Particle $A$ travels with a constant speed of 2 units per minute on the $x$-axis starting at the point (4,0) and moving away from the origin, while particle $B$ travels with a constant speed of 1 unit per minute on the $y$-axis starting at the point (0,8) and moving towards the origin. Find the rate of change of the distance between the two particles when the distance between the two particles is exactly 10 units.