here's the question...
does rectangle A have a greater perimeter than rectangle B?
1) the length of a side of rectangle A is twice the length of a side of rectangle B
2) the area of rectangle A is twice the area of rectangle B
the answer is C, could someone please explain why C is the answer? thanks!
Let the sides of rectangle A be s
and the side of rectangle B m
Question: is 2(s+t)>2(m+n)
? --> or is s+t>m+n
, clearly insufficient as no info about the other side of rectangles.
, also insufficient as if s=t=2
then the answer would be YES, but if s=t=2
then the answer would be NO.
--> substitute s
, so t=n
. Thus as s=2m
which is obviously more than m+n