A man can row upstream at 12kmph and downstream at 16 kmph. The speed of the stream is
Options.
A) 2 km/hr  B) 4 km/hr  C) 5 km/hr  D) 10 km/hr  E) None
Sol.   Speed of stream = 1/2(16 -12) kmph = 2 kmph.   2 km/hrnswer 2 km/hr
<result>A</result>
A man can row upstream at 12kmph and downstream at 16 kmph. The speed of the stream is