What is the speed of the stream if a canoe rows upstream at 6km/hr and downstream at 12km/hr  Answers:
A) 1 kmph  B) 4 kmph  C) 3 kmph  D) 2 kmph  E) 1.9 kmph

Rationale: "sol . speed of stream = 1 / 2 ( 12 - 6 ) kmph = 3 kmph . answer c"
Answer: C