A rectangular field is to be fenced on three sides leaving a side of 20 feet uncovered. If the area of the field is 650 sq. feet, how many feet of fencing will be required?	Choose the correct choice:
A) 34
B) 40
C) 85
D) 88
E) None
EXPLANATION   We have: l = 20 ft and lb = 650 sq. ft.   So, b = 32.5 ft.   Length of fencing = (l + 2b) = (20 + 65)= 
<gadget id="calculator">(20 + 65)</gadget>
<output>85</output>
85 ft.   Answer 85
<result>C</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 650 sq. feet, how many feet of fencing will be required?