A person can row at 10 kmph in still water. If the velocity of the current is 2 kmph and it takes him 20 hour to row to a place and come back, how far is the place?  Select the correct option:
A) 24km
B) 30km
C) 96km
D) 12km
E) 15km
Speed of down stream = 10+2= 
<gadget id="calculator">10+2</gadget>
<output>12</output>
12kmph   speed of upstream= 10-2= 
<gadget id="calculator">10-2</gadget>
<output>8</output>
8kmph   Let the required distance be xkm   x/12 + x/8= 20   2x+3x = 480   x = 96 km   Answer is 96km
<result>C</result>
A person can row at 10 kmph in still water. If the velocity of the current is 2 kmph and it takes him 20 hour to row to a place and come back, how far is the place?