text: how long before fred and wilma meet on the other side of a 400m track running in opposite directions? given: fred runs 17 meters every two seconds, wilma runs 6 yards per second, answer to the nearest second the relative speed will get added up as they are running in oppositedirections distance=400m speed=8.5+6*0.9144 =8.5+5.4864 =13.9864 time=distance/speed =400/13.9864 =28.6sec =29 sec