The area of rectangle with length l and width w is
If the length of rectangle is expressed as 
and the width of rectangle is expressed as 
, then the area of rectangle is
I hope this helps you
Area=length.width
343=l.w
7.7.7=l.w
l=49
w=7
Perimeter=2 (49+7)
Perimeter=2.56
Perimeter=112
28, because 150/7 is about 21 and 28 is the closest answer. I would need more info for it to be a definite answer but that is what I would choose. Hope I helped!
