Question 174982
W=L/2+70
2L+2W=1,280
2L+2(L/2+70)=1,280
2L+2L/2+140=1,280
2L+L=1,280-140
3L=1,140
L=1,140/3
L=380 IS THE LENGTH.
W=380/2+70
W=190+70
W=260 IS THE WIDTH.
PROOF:
2*380+2*260=1,280
760+520=1,280
1,280=1,280