A man can row upstream at 10kmph and downstream at 28 kmph. The speed of the stream is Choose one
A) 2 km/hr B) 4 km/hr C) 5 km/hr D) 10.5 km/hr E) None
Sol.   Speed of stream = 1/2(28-10) kmph = 4 kmph.   Answer 4 km/hr
<result>B</result>
A man can row upstream at 10kmph and downstream at 28 kmph. The speed of the stream is