A man swims downstream 32 km and upstream 24 km taking 4 hours each time, what is the speed of the man in still water? Choose the correct choice from the following choices:	A) 9	B) 8	C) 6	D) 7	E) 2
32 --- 4 7S = 8   ? ---- 1   24 ---- 4 US = 6   ? ---- 1 M = ?   M = (8 + 6)/2= 
<gadget id="calculator">(8 + 6)/2</gadget>
<output>7</output>
7   Answer: 7
<result>D</result>
A man swims downstream 32 km and upstream 24 km taking 4 hours each time, what is the speed of the man in still water?