Question 730608
P=2L+2W
L=2W
81=2*2W+2W
81=4W+2W
81=6W
W=81/6
W=13.5 ANS. FOR THE WIDTH.
L=2*13.5
L=27 ANS. FOR THE LENGTH.
PROOF:
81=2*27+2*13.5
81=54+27
81=81