Odpowiedź:
20km : 30km/h = 2/3 h = 40 min
15 min = 1/4h
45 min = 3/4 h
3/4h + 1/4h + 2/3 h = 1h+2/3h = 5/3h
20km + 20km = 40 km
40 km : 5/3h = 24 km/h
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Odpowiedź:
20km : 30km/h = 2/3 h = 40 min
15 min = 1/4h
45 min = 3/4 h
3/4h + 1/4h + 2/3 h = 1h+2/3h = 5/3h
20km + 20km = 40 km
40 km : 5/3h = 24 km/h
Wyjaśnienie: