A man rows his boat 78 km downstream and 56 km upstream, taking 4 hours each time. Find the speed of the stream? Choose the correct choice from the following options:
A) 6
B) 5
C) 7
D) 8
E) 3
Speed downstream = d/t = 78/(4) = 20 kmph   Speed upstream = d/t = 56/(4)= 
<gadget id="calculator">56/(4)</gadget>
<output>14</output>
14 kmph   The speed of the stream= (20 - 14)/2= 
<gadget id="calculator">(20 - 14)/2</gadget>
<output>3</output>
3 kmph   Answer:3
<result>E</result>
A man rows his boat 78 km downstream and 56 km upstream, taking 4 hours each time. Find the speed of the stream?