A man can row at 5 kmph in still water .If the velocity of current is 1 kmph and it takes him 1 hour to row to a place and come back ,how far is the place ?  Choose the correct choice:
A) 2.4 km  B) 2.5 km  C) 3 km  D) 3.6 km  E) None of these
Answer A   Solution   Speed downstream = kmph = 6 kmph,Speed upstream = (5 - 1)= 
<gadget id="calculator">(5 - 1)</gadget>
<output>4</output>
4 kmph.   Let the required distance be x km.   Then,x/6 + x/4= 1 =&gt; 2x + 3x = 12 5x = 12=&gt; x = 2.4 km. 2.4 kmnswer 2.4 km
<result>A</result>
A man can row at 5 kmph in still water .If the velocity of current is 1 kmph and it takes him 1 hour to row to a place and come back ,how far is the place ?