Răspuns :
I=I
l=I+5
P=2X (l+L)
50=2Xl+2xL+10
50=4I+10
4l=50-10
4l=40
l=40:4
l=10
L=l+5
L=10+5
L=15
A=l X L
A=10X15
A=150
l=I+5
P=2X (l+L)
50=2Xl+2xL+10
50=4I+10
4l=50-10
4l=40
l=40:4
l=10
L=l+5
L=10+5
L=15
A=l X L
A=10X15
A=150