The speed of a boat in still water is 14 km/hr and the rate of current is 5 km/hr. The distance travelled downstream in 8 minutes is	Choices.
A) 1.6 km
B) 2.5 km
C) 3.6 km
D) 4 km
E) none of these

Rationale: "explanation : speed downstreams = ( 14 + 5 ) kmph = 19 kmph . distance travelled = ( 19 x 8 / 60 ) km = 2.5 km option b"
Answer: B