If the perimeter of a rectangular garden is 600 m, its length when its breadth is 120 m is? Choose the correct option:
A) 286 m
B) 180 m
C) 200 m
D) 166 m
E) 187 m

Rationale: "2 ( l + 120 ) = 600 = > l = 180 m answer : b"
Answer: B