Răspuns :
x=lungime drum
x/3=ziua 1
x-x/3=2x/3=rest
2x/3*3/8=x/4=ziua 2
x/3+x/4+25=x
4x+3x+300=12x
5x=300
x=60 km
2
P₁=48
L₁+l₁=48:2=24 l₁=24-L₁
(L₁-6)(l₁+2)=L₁ *l₁-16
(L₁-6)(24-L₁+2)=L₁ *(24-L₁)-16
(L₁-6)(26-L₁)=L₁ *(24-L₁)-16
26L₁-156-L₁²+6L₁=24L₁ -L₁²-16
32L₁-156=24L₁ -16
8L₁=140
L₁=17,5 cm
l₁=24-17,5=6,5 cm
x/3=ziua 1
x-x/3=2x/3=rest
2x/3*3/8=x/4=ziua 2
x/3+x/4+25=x
4x+3x+300=12x
5x=300
x=60 km
2
P₁=48
L₁+l₁=48:2=24 l₁=24-L₁
(L₁-6)(l₁+2)=L₁ *l₁-16
(L₁-6)(24-L₁+2)=L₁ *(24-L₁)-16
(L₁-6)(26-L₁)=L₁ *(24-L₁)-16
26L₁-156-L₁²+6L₁=24L₁ -L₁²-16
32L₁-156=24L₁ -16
8L₁=140
L₁=17,5 cm
l₁=24-17,5=6,5 cm