Răspunsuri

2014-05-13T15:57:13+03:00
P=l+l+L+L
unde l- latura mica
L- latura mare

2l+2L=40 /:2
l+L=20
L=2l/3

2l/3+l=40 Aducem la acelasi numitor
2l+3l=120
5l=120
l=120:5
l=24

L=2*24/3
L=16