Răspuns :
L = 8 m + 2 m = 10 m
P = 2 × L + 2 × l
288 m = 2 × 10 m + 2 × l
288 m = 20 m + 2 × l
2 × l = 288 m - 20 m
2 × l = 268 m
l = 268 m : 2
l = 134 m
A = L × l
A = 10 m × 134 m
A = 1 340 m pătrați
P = 2 × L + 2 × l
288 m = 2 × 10 m + 2 × l
288 m = 20 m + 2 × l
2 × l = 288 m - 20 m
2 × l = 268 m
l = 268 m : 2
l = 134 m
A = L × l
A = 10 m × 134 m
A = 1 340 m pătrați