What is the speed of the stream if a canoe rows upstream at 3km/hr and downstream at 12km/hr
Choose the correct choice from the following answers.
A) 1 kmph	B) 4 kmph	C) 3 kmph	D) 2 kmph	E) 4.5 kmph

Rationale: "sol . speed of stream = 1 / 2 ( 12 - 3 ) kmph = 4.5 kmph . answer e"
Answer: E