A man swims downstream 24km and upstream 16km taking 4 hours each time, what is the speed of the man in still water?	Choose the most appropriate option:	A) 8	B) 5	C) 24	D) 12	E) 36
24 --- 4 DS = 6   ? ---- 1   16 ---- 4 US = 4   ? ---- 1 M = ?   M = (6+ 4)/2= 
<gadget id="calculator">(6+ 4)/2</gadget>
<output>5</output>
5   Answer: 5
<result>B</result>
A man swims downstream 24km and upstream 16km taking 4 hours each time, what is the speed of the man in still water?