Explicație pas cu pas:
1)
L+l=602
L:2l=>L=2l*2+17=>L=4l+17
5l=602-17
5l=185
l=117 cm
L=4*117+17=485 cm
A= 485*117=56745 cm^2
2)
V=h*l*L=5*4*1,2=24 m^3=24000
3.
x*y=1645
(x-5)*y=1645-235=1410
y=1410/(x-5)
1410x=1645(x-5)
1410x=1645x-8225
x=(1645-1410)/8225
x=235/8225
y=(1645*8225)/235=
=57575
Bafta!