Răspunsuri

2014-05-11T21:11:58+03:00
P=l+l+L+L
l+l+L+L=420
2l+2L=420
2(l+L)=420
l+L=240

L=18+2l
l+18+2l=240
3l=240-18
3l=333
l=222:3
l=74

L=18+2l
L=18+2*74
L=18+148
L=166