A boat travel upstream from B to A and down stream from A to B in 3 hours. If the speed of boat in still water is 9 km/hr. and the speed of current is 3 km/hr the distance A and B (km) is
A 4
B 6
C 8
D 12
Solution
Correct Answer: Option D
Let, Distance = x Given Condition - Time taken in upstream _ Time taken downstream = Total time