A start walking from a place at a uniform speed of 2 km/hour
in a particular Direction. After half an hour, B starts from the same Place and
walks in the same direction as A at uniform speed and over takes A after 1 hour
48 min. calculate the speed of B ?Solved Sum from Arun Sharma.. I need If any one can come up with new Approach.

1) 20/9
2) 24/9
3) 21/9
4) 23/9