A rectangular farm has to be fenced one long side, one short side and the diagonal. If the cost of fencing is Rs.12 per meter. The area of farm is 1200 m2 and the short side is 30 m long. How much would the job cost?  Choose the correct choice from the following answers: A) 1440 B) 1200 C) 2832 D) 1299 E) 1236

Rationale: "explanation : l * 30 = 1200 è l = 40 40 + 30 + 50 = 120 120 * 12 = 1440 answer : option a"
Answer: A