Răspuns :
2h.....30 m
3h......x m
X= 3*30/2= 90/2=45 m in 3 h
2h.....30m
5h......x m
X = 30*5/2= 150/2= 75 m in 5 h
3h......x m
X= 3*30/2= 90/2=45 m in 3 h
2h.....30m
5h......x m
X = 30*5/2= 150/2= 75 m in 5 h
30 / 2 = 15 m/h (viteza melcului)
3 x 15 = 45 m (in 3 ore)
5 x 15 = 75 m (in 5 ore)