A man can row his boat with the stream at 20 km/h and against the stream in 4 km/h. The man's rate is?	Select:
A) 1 kmph  B) 7 kmph  C) 98 kmph  D) 6 kmph  E) 8 kmph
DS = 20   US = 4   S = ?   S = (20 - 4)/2= 
<gadget id="calculator">(20 - 4)/2</gadget>
<output>8</output>
8 kmph   Answer: 8 kmph
<result>E</result>
A man can row his boat with the stream at 20 km/h and against the stream in 4 km/h. The man's rate is?