Răspuns :
30m-----------5ore
xm-------------1ora
_________________
x = 30*1 : 5 = 30:5 = 6 m
30m-----------5ore
xm-------------1/2ora
_________________
x = 30*1/2 : 5 = 15:5 = 3m
xm-------------1ora
_________________
x = 30*1 : 5 = 30:5 = 6 m
30m-----------5ore
xm-------------1/2ora
_________________
x = 30*1/2 : 5 = 15:5 = 3m