Frank the Fencemaker needs to fence in a rectangular yard. He fences in the entire yard, except for one full side of the yard, which equals 40 feet. The yard has an area of 240 square feet. How many feet offence does Frank use? Choose the correct choice from the following choices:  A) 14  B) 52  C) 54  D) 180  E) 240

Rationale: "area = length x breadth 240 = 40 x breadth so , breadth = 6 units fencing required is - breadth + breadth + length 6 + 6 + 40 = > 52 feet answer must be ( b ) 52"
Answer: B