A man can row his boat with the stream at 20 km/h and against the stream in 8 km/h. The man's rate is? Options
A) 1 kmph B) 7 kmph C) 6 kmph D) 5 kmph E) 4 kmph
DS = 20   US = 8   S = ?   S = (20 - 8)/2= 
<gadget id="calculator">(20 - 8)/2</gadget>
<output>6</output>
6 kmph   Answer: 6 kmph
<result>C</result>
A man can row his boat with the stream at 20 km/h and against the stream in 8 km/h. The man's rate is?