1. 5 ore 40 min= 60 x 5 + 40 = 300 + 40 = 340 minute
238/340 = 0.7 km/min
0.7 x 60 = 42 km/h
2. 240/60=4 km/min
4 x 48 = 192 km
3. 20 m = 0.02 km => 20 m/s = 0.02 km/s
0.02 x 3600 = 72 km/h
12 hm = 1200 m = 1.2 km => 12 hm/min = 1.2 km/min
1.2 x 60 = 72 km/h
toate