Question

O gradina dreptunghiulara are perimetrul de 5600 m.lungimea reprezinta doua treimi din lungime.care sunt dimensiunile gradinii??

Answer 1

P=2(L+l)=5600 m
L+l=2800 m
l=2L/3
L+2L/3=2800
3L+2L=8400
5L=8400
L=1680 m
l=1680×2/3=1120 m

Answer 2

P= 2(L+l)
L+l =5600÷2=2800
2/3L+3/3L=2800
5/3=2800
2800×3÷5=1680
L= 1680m.
l=2/3L
l= 1680÷3×2
l=1120m.
sau:
2800-1680=1120 (m).