A man can row his boat with the stream at 19 km/h and against the stream in 11 km/h. The man's rate is?	Choices:
A) 4 kmph
B) 2 kmph
C) 7 kmph
D) 8 kmph
E) 3 kmph
DS = 19   US = 11   S = ?   S = (19 - 11)/2= 
<gadget id="calculator">(19 - 11)/2</gadget>
<output>4</output>
4 kmph   4 kmphnswer:4 kmph
<result>A</result>
A man can row his boat with the stream at 19 km/h and against the stream in 11 km/h. The man's rate is?