A rectangular field is to be fenced on three sides leaving a side of 20 feet uncovered.If the area of the field is 800 sq.ft, how many feet of fencing will be required ? Choose the most appropriate option.
A) 100feet
B) 120feet
C) 150feet
D) 180feet
E) 186feet
Explanation:   We are given with length and area, so we can find the breadth.   as Length * Breadth = 100feetrea   =&gt; 20 * Breadth = 800   =&gt; Breadth = 40 feet   100feetrea to be fenced = 2B + L = 2*40 + 20= 
<gadget id="calculator">2*40 + 20</gadget>
<output>100</output>
100 feet   100feetnswer: Option 100feet
<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 800 sq.ft, how many feet of fencing will be required ?