If the perimeter of a rectangular house is 1400 m, its length when its breadth is 300 m is?	Pick:
A) 300
B) 400
C) 500
D) 600
E) 700
2(l + 300) = 1400 =&gt; l = 400 m Answer: 400
<result>B</result>
If the perimeter of a rectangular house is 1400 m, its length when its breadth is 300 m is?