A man can row upstream at 8kmph and downstream at 13 kmph.The speed of the stream is :	Select the correct option
A) 2.5 km/hr
B) 4.2 km/hr
C) 5 km/hr
D) 10.5 km/hr
E) None of these
Solution   Speed of stream =1/2(13-8) kmph = 2.5 kmph . 2.5 km/hrnswer 2.5 km/hr
<result>A</result>
A man can row upstream at 8kmph and downstream at 13 kmph.The speed of the stream is :