Question

O gradina in forma de dreptungi are perimetrul de 400 m. Sa se afle latimea ei, stiind ca lungimea este cu 40 m mai mare decat latimea.

Answer 1

l 
L=l+40
P=2 X(L +l )
400=2 x (l+40+l)
400=2x (2l+40)
400=4l+80
4l=400-80
4l=320
l=320:4
l=80  latimea

L=80+40
L=120 latimea

Answer 2

p= ( l+40+l )x 2
p = (2l +40)X2
400/2=2l+40
200=2l+40
200-40=2l
160=2l
l=160/2
l=80
L=80+40=120
p=(120+80)*2=400
p=200*2=400