A man can row
9 1/3
kmph in still water and finds that it takes him thrice as much time to row up than as to row, down the same distance in the river. The speed of the current is. Pick one.
A) 3 2/3kmph	B) 4 2/3kmph	C) 5 2/3kmph	D) 6 2/3kmph	E) None of these
Explanation:   Friends first we should analyse quickly that what we need to calculate and what values we require to get it.   So here we need to get speed of current, for that we will need speed downstream and speed upstream, because we know   Speed of current = 1/2(a-b) [important]   Let the speed upstream = x kmph   Then speed downstream is = 3x kmph [as per question]   speed in still water = 1/2(a+b)   =&gt;1/2(3x+x)   =&gt;2x as per question we know,   2x=9 1/3   =&gt;2x=28/3   =&gt;x=14/3   So,   Speed upstream = 14/3 km/hr, Speed downstream 14 km/hr.   Speed of the current   =1/2[14−14/3]   =14/3=4 2/3kmph   Option 4 2/3kmph
<result>B</result>
A man can row
9 1/3
kmph in still water and finds that it takes him thrice as much time to row up than as to row, down the same distance in the river. The speed of the current is.