Răspuns:
Explicație pas cu pas:
I /....../....../....../......./......./......../......../......../......../....../
II /..../...../...../...../...../...../...../..../ luam 3/8 raman 5/8
III /..../...../...../...../..../ luam 3/5 raman 2/5
adica 30 km
30 : 2 = 15
15 x5 = 75 III zi
II zi = 15 x 8 = 120
I zi 120
total drum 120 x 2 = 240