A rectangular field is to be fenced on three sides leaving a side of 20 feet uncovered.If the area of the field is 600 sq.ft, how many feet of fencing will be required ? Choose the correct option:
A) 80feet
B) 70feet
C) 60feet
D) 50feet
E) 20feet
Explanation:   We are given with length and area, so we can find the breadth.   as Length * Breadth = 80feetrea   =&gt; 20 * Breadth = 600   =&gt; Breadth = 30 feet   80feetrea to be fenced = 2B + L = 2*30 + 20= 
<gadget id="calculator">2*30 + 20</gadget>
<output>80</output>
80feet   80feetnswer: Option 80feet
<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 600 sq.ft, how many feet of fencing will be required ?