A farmer built a fence around his square plot. He used 27 fence poles on each side of the square. How many poles did he need altogether ?  Choose the correct choice from the following options.
A) 100
B) 104
C) 108
D) 106
E) None of these
Explanation:   Since each pole at the corner of the plot is common to its two sides, so we have :   Total number of poles needed = 27 x 4 - 4 = 108 - 4= 
<gadget id="calculator">108 - 4</gadget>
<output>104</output>
104.   Answer: 104
<result>B</result>
A farmer built a fence around his square plot. He used 27 fence poles on each side of the square. How many poles did he need altogether ?