If the length of a rectangular field is 30 metres more than its breadth and the perimeter of the field is 540 metres, what is the area of the field in square metres? Choose the correct choice.
A) 18000  B) 40000  C) 31000  D) 19000  E) 16000

Rationale: let breadth is x then length is 30 + x now the perimeter = 2 ( x + 30 + x ) = 540 solving this we get x = 120 now the area is 120 * 150 = 18000 answer : a
Answer: A