What is the speed of the stream if a canoe rows upstream at 6km/hr and downstream at 10km/hr Options:  A) 1 kmph  B) 4 kmph  C) 3 kmph  D) 2 kmph  E) 1.9 kmph

Rationale: sol . speed of stream = 1 / 2 ( 10 - 6 ) kmph = 2 kmph . answer d
Answer: D