A man swims downstream 48 km and upstream 42 km taking 6 hours each time; what is the speed of the current?  Choose the correct choice from the following options.
A) 3 kmph B) 0.5 kmph C) 13 kmph D) 6.5 kmph E) 7:3kmph
Explanation:   48 --- 6 DS = 8   ? ---- 1   42 ---- 6 US = 7   ? ---- 1 S = ?   S = (8 - 7)/2= 
<gadget id="calculator">(8 - 7)/2</gadget>
<output>1/2 = around 0.5</output>
0.5   Answer: Option 0.5 kmph
<result>B</result>
A man swims downstream 48 km and upstream 42 km taking 6 hours each time; what is the speed of the current?