Hello !!
ex 1)
1) V = d/t
V = 10m / 20s = 0.5m/s
2) 0.5 * 3.6 = 1.8 km / h
ex 2)
1 ) V = d/t
14.3 km = 14300 m
3 min = 180 s
V = 14300/180 = 79.4 m/s
2) 79.4 * 3.6 = 286 km/h
ex 3 )
V * t = d
90 km / h = 25 m / s
12min = 720s
720 * 25 = 18000 m = 18 km
ex 4)
D = t * V
130 km/h
1h45 = 1.75 h
130 * 1.75 = 227 .5 km
la distance est de 227.5 km
bonne journée
