Speed of a boat along the current and against the current are 12 km/hr and 6 km/hr respectively. What is the speed of boat (in km/hr) in still water?

Speed of a boat along the current and against the current are 12 km/hr

1.	Speed of a boat along the current and against the current are 12 km/hr and 6 km/hr respectively. What is the speed of boat (in km/hr) in still water?
A.	3
B.	6
C.	9
D.	12
Answer» D. 12