Related Rates Question

Question

A man starts walking north at 2 ft/s from a point P. Five minutes later a woman starts walking south at 4 ft/s from a point 500 ft due east of P. At what rate (in ft/s) are the people moving apart 15 minutes after the woman starts walking? (Round your answer to two decimal places.)

Answer 1

Please see video. This really required many figures to explain.