A rectangular field is to be fenced on three sides leaving a side of 20 feet uncovered.If the area of the field is 680 sq.ft, how many feet of fencing will be required ?  Choose the most appropriate option:
A) 88 feet
B) 86 feet
C) 84 feet
D) 82 feet
E) 83 feet
Explanation:   We are given with length and area, so we can find the breadth.   as Length * Breadth = 88 feetrea   =&gt; 20 * Breadth = 680   =&gt; Breadth = 34 feet   88 feetrea to be fenced = 2B + L = 2*34 + 20= 
<gadget id="calculator">2*34 + 20</gadget>
<output>88</output>
88 feet   88 feetnswer: Option 88 feet
<result>A</result>
A rectangular field is to be fenced on three sides leaving a side of 20 feet uncovered.If the area of the field is 680 sq.ft, how many feet of fencing will be required ?