0,(1)=1/9
ziua 1 =180 *1/9=20 km
rest =180-20=160 km
distanta ziua 2 =160 *0,25=40 km
rest = 180-20-40=120 km
x=distanta ziua 3
120-x= distanta ziua 4
2x/13=2/11(120-x)
x/13=1/11(120-x)
11x=1560-13x
24x=1560
x=65 km ziua 3
120-65=55 km ziua 4
ziua 1 20 km
ziua 2 40 km
ziua 3 65 km
ziua 4 55 km