what is the speed of the stream if a canoe rows upstream at 6 km / hr and downstream at 12 km / hr  Choose the correct choice from the following answers
A) 1 kmph	B) 4 kmph	C) 3 kmph	D) 2 kmph	E) 1.9 kmph
<gadget id="calculator">12 - 6</gadget>
<output>6</output>

<gadget id="calculator">6 / 2</gadget>
<output>3</output>

<result>C</result>
what is the speed of the stream if a canoe rows upstream at 6 km / hr and downstream at 12 km / hr
divide(subtract(12, 6), const_2)
"sol . speed of stream = 1 / 2 ( 12 - 6 ) kmph = 3 kmph . answer c"