arithmetic - two persons start from two places 160 km apart at the same time with velocities 50 kmhr and 30 kmhr move in opposite direction where they meet - skillgun

Solution: d = 160, v1 = 50, v2 = 30
relative speed vr = v1 + v2 = 50 + 30 = 80.
the distance covered by them will be indirectly proportional to their distance
of the persons of meeting from A = 160*50/(50+30) km
= 160*5/8 = 100 km.