Răspuns :
L = 345 m
l = 345 : 5 = 69 m
P = 2 × ( L + l ) = 2 × ( 345 + 69 ) = 2 × 414 = 828 m
L=345
l=345 : 5
l=69
345m = 34500cm
69m=6900cm
P=34500 x 2 + 6900 x 2=
P=69000 + 13800=82800
L = 345 m
l = 345 : 5 = 69 m
P = 2 × ( L + l ) = 2 × ( 345 + 69 ) = 2 × 414 = 828 m
L=345
l=345 : 5
l=69
345m = 34500cm
69m=6900cm
P=34500 x 2 + 6900 x 2=
P=69000 + 13800=82800