A man can row his boat with the stream at 6 km/h and against the stream in 4 km/h. The man's rate is?
Answers:
A) 1	B) 4	C) 7	D) 9	E) 6
DS = 6   US = 4   S = ?   S = (6 - 4)/2= 
<gadget id="calculator">(6 - 4)/2</gadget>
<output>1</output>
1 kmph   1nswer: 1
<result>A</result>
A man can row his boat with the stream at 6 km/h and against the stream in 4 km/h. The man's rate is?