A rectangular field is to be fenced on three sides leaving a side of 20 feet uncovered.If the area of the field is 400 sq.ft, how many feet of fencing will be required ?
Select the correct option:
A) 60feet
B) 50feet
C) 40feet
D) 30feet
E) 5feet
Explanation:   We are given with length and area, so we can find the breadth.   as Length * Breadth = 60feetrea   =&gt; 20 * Breadth = 400   =&gt; Breadth = 20 feet   60feetrea to be fenced = 2B + L = 2*20 + 20= 
<gadget id="calculator">2*20 + 20</gadget>
<output>60</output>
60 feet   60feetnswer: Option 60feet
<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 400 sq.ft, how many feet of fencing will be required ?