prima zi: 1/4din drum
[tex] \frac{1}{4} \times 48 = \frac{1 \times 48}{4} = \frac{48}{4} = 12km \: prima \: zi[/tex]
in a 2a zi:1/2 din rest
restul este:48km-12km=36km
[tex] \frac{1}{2} \times 36 = \frac{1 \times 36}{2} = \frac{36}{2} = 18km \: a \: doua \: zi[/tex]
48km-12km (prima zi)-18km (a doua zi)=18km a parcurs a treia zi
