A rectangular field is to be fenced on three sides leaving a side of 80 feet uncovered.If the area of the field is 680 sq.ft, how many feet of fencing will be required? Choose the correct choice from the following:
A) 44 ft
B) 97 ft
C) 22 ft
D) 11 ft
E) 66 ft

Rationale: "given that length and area , so we can find the breadth . length x breadth = area 80 x breadth = 680 breadth = 8.5 feet area to be fenced = 2 b + l = 2 ( 8.5 ) + 80 = 97 feet answer : b ) 97 ft"
Answer: B