A man can row 10 kmph in still water. When the river is running at 1.2 kmph, it takes him 1 hour to row to a place and black. How far is the place?  Choose the correct choice from the following answers
A) 5.02  B) 4.92  C) 4.82  D) 4.72  E) 4.61
M = 10   S = 1.2   DS = 10 + 1.2= 
<gadget id="calculator">10 + 1.2</gadget>
<output>11.2</output>
11.2   US= 10 - 1.2= 
<gadget id="calculator">10 - 1.2</gadget>
<output>8.8</output>
8.8   x/11.2 + x/8.8= 1   x = 4.92.Answer: 4.92
<result>B</result>
A man can row 10 kmph in still water. When the river is running at 1.2 kmph, it takes him 1 hour to row to a place and black. How far is the place?