Question 174134
AREA OR THE BRICK PATIO=LW
L=2W
AREA=2W*W=2W^2
AREA OF GARDEN=54
54=(L+3)(W+3)-2W^2
54=(2W+3)(W+3)-2W^2
54=2W^2+9W+9-2W^2
54=9W+9
9W=54-9
9W=45
W=45/9
W=5m.
L=2*5=10m.
PROOF:
54=(10+3)(5+3)-2*5^2
54=13*8-2*25
54=104-50
54=54