arithmetic - two men start from the same place at the same time with velocities of 25 kmhr and 20 kmhr 1 in same direction 2 and in opposite direction what will be the distance between them after 2 hours - skillgun

Solution: (1) If they move in same direction, the relative speed = difference of their velocities
= (25 -20)km/hr = 5 km/hr;
distance after 2 hours = v*t = 5*2
= 10 km.
(2) If they move in opposite direction, the relative speed = sum of their velocities
= (25+20)km/hr = 45 km/hr ;
distance after 2 hours = v*t = 45*2
= 90 km.