Reason for this problem as a x y plane. The origin (0,0) is the junction. Car A passes through the intersection traveling 8.33 m/s (30km/h) and after 5 seconds would be 41.67 m east of the intersection, or point (41.67, 0). Car B starts 38 m north of the intersection, or point (0,38). Calculate how far car B will travel in 5 seconds and subtract 38 m from it. That will give you how far south of the origin car B will be placed. You will then have two points – one along the x-axis (car A) and one along the y-axis (car B).