Question 70426
LENGTH=(2W+8)
PERIMETER IS=2L+2W 
64=2(2W+8)+2W
64=4W+16+2W
64-16=6W
48=6W
W=48/6
W=8 FOR THE WIDTH THUS THE LENGTH IS
2*8+8
16+8
24 IS THE LENGTH
PROOF
2*24+2*8=64
48+16=64
64=64