A man swims downstream 24 km and upstream 12 km taking 6 hours each time, what is the speed of the man in still water?
Choose the correct choice.
A) 5
B) 8
C) 10
D) 4
E) 3
24 --- 6 DS = 4   ? ---- 1   12 ---- 6 US = 2   ? ---- 1 M = ?   M = (4+2)/2= 
<gadget id="calculator">(4+2)/2</gadget>
<output>3</output>
3   Answer: 3
<result>E</result>
A man swims downstream 24 km and upstream 12 km taking 6 hours each time, what is the speed of the man in still water?