A man can row 9 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) 4.32 B) 4.42 C) 4.52 D) 4.62 E) 4.72
M = 9   S = 1.2   DS = 9 + 1.2= 
<gadget id="calculator">9 + 1.2</gadget>
<output>10.2</output>
10.2   US= 9 - 1.2= 
<gadget id="calculator">9 - 1.2</gadget>
<output>7.8</output>
7.8   x/10.2 + x/7.8= 1   x = 4.42.Answer: 4.42
<result>B</result>
A man can row 9 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?