Răspuns :
P=162m
l=a
L=a+1
P=l+L+l+L ⇔
162=a+a+1+a+a+1 ⇔
162=4a+2⇒
4a=162-2⇒
4a=160⇒
a=160:4
a=40⇒l=40
L=40+1=41
Aria=l*L=40*41=1640 m²
l=a
L=a+1
P=l+L+l+L ⇔
162=a+a+1+a+a+1 ⇔
162=4a+2⇒
4a=162-2⇒
4a=160⇒
a=160:4
a=40⇒l=40
L=40+1=41
Aria=l*L=40*41=1640 m²
P=2×(L+l);L=l+1⇒P=2×(l+1+l)⇒162=2×(2×l+1)
2×l+1=162÷2⇒2×l+1=81⇒2×l=81-1⇒2×l=80⇒l=80÷2⇒l=40m
L=l+1=40+1⇒L=41m
A=L×l=41×40=1640m²
2×l+1=162÷2⇒2×l+1=81⇒2×l=81-1⇒2×l=80⇒l=80÷2⇒l=40m
L=l+1=40+1⇒L=41m
A=L×l=41×40=1640m²