A man swims downstream 72 km and upstream 45 km taking 12 hours each time; what is the speed of the current? Pick:  A) 1.125  B) 1.128  C) 1.126  D) 1.123  E) 1.121
72 --- 12 DS = 6   ? ---- 1   45 ---- 12 US = 3.75   ? ---- 1 S = ?   S = (6 - 3.75)/2= 
<gadget id="calculator">(6 - 3.75)/2</gadget>
<output>1.125</output>
1.125   1.125nswer:1.125
<result>A</result>
A man swims downstream 72 km and upstream 45 km taking 12 hours each time; what is the speed of the current?