1 ) p = 42 - 18
p = 24 => P = 48
2 ) L-l = 39 m => L = 39 + l
P= 2( L + l )
P = 2 ( 39 + l + l )
P = 2 ( 39 + 2l )
P = 78 + 4l
702 = 78 + 4l
702- 78 = 4l
624 = 4l => l = 624:4
l = 156
L- 156 = 39
L = 195
c ) [tex] \frac{1}{4} [/tex] · l = 24
[tex] \frac{l}{4} [/tex] = 24
l = 24 · 4
l = 96
P= 4 · 96 = 384