Question 306001
AREA=12 CM^2
AREA=LW
L=W-11
12=(W-11)W
12=W^2-11W
W^2-11W-12=0
(W-12)(W+1)=0
W-12=0
W=12 CM. ANS. FOR THE WIDTH.
L=12-11=1 CM.ANS. FOR THE LENGTH. 
PROOF:
12=12*1
12=12