Răspuns:
Explicație pas cu pas:
Prima zi D/2
Rest D/2
A doua zi 1/4 * D/2 = D/8
Rest D/2 - D/8 = 4D/8 - D/8 = 3D/8
Drumul ____ ____ ____ ____ ____ ____ ____ ____
_____Zi 1__________/_Zi 2/_____Zi 3____/
3/8 din drum = 18 km
1/8 din drum are 18 : 3 = 6 km
Tot drumul are 8/8, deci 6 x 8 = 48 km