A man can row upstream at 8 kmph and downstream at 13 kmph. The speed of the stream is :
Choose the correct choice from the following options:
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 8 kmph and downstream at 13 kmph. The speed of the stream is :