Question

Gardul care inconjoara o gradina dreptunghiulara masoara 800m.stiind ca latimea reprezinta un sfert din lungime,calculeaza cati metri are lungimea gradinii

Answer 1

P=2(L+l)
2(L+l)=800
2(L+L/4)=800
L+L/4=800/2
L+L/4=400
4L+L=400x4
5L=1600
L=1600/5
L=320

unde P=perimetrul gradinii
P=800m

Answer 2

l=800 m
L=800:4=200 L
2×l+2×L=2×800+2×200=1600+400=2000