Odpowiedź:
1.
W rozwiązaniach zadania korzystamy ze wzoru s = v * t , gdzie :
v - prędkość
s - droga
t - czas
a)
t = 2h
v = 30 km/h
s = v * t = 30 km/h * 2 h = 60 km
b)
t = 3h
v = 10 km/h
s = v * t = 10 km/h * 3h = 30 km
c)
t = 5h
v = 60 km/h
s = v * t = 60 km/h * 5h = 300 km
d)
t = 4h
v = 10 km/h
s = v * t = 10 km/h * 4h = 40 km
e)
t = 8h
v = 80 km/h
s = v*t = 80 km/h * 8h = 640 km
f)
t = 20h
v = 120 km/h
s = v * t = 120 km/h * 20h = 2400 km
g)
t = 3h
v = 12 km/h
s = v * t = 12 km/h * 3h = 36 km
h)
t = 4h
v = 80 km/h
s = v * t = 80 km/h * 4h = 320 km
i)
t = 5h
v = 40 km/h
s = v* t = 40 km/h * 5h = 200 km
2.
W rozwiązaniu zadania korzystamy ze wzoru v = s/t , gdzie :
s - droga
t - czas
v - prędkość
a)
s = 200 km
t = 4h
v = s/t = 200 km : 4h = 200/4 km/h = 50 km/h
b)
s = 210 km
t = 3h
v = s/t = 210 km : 3h = 210/3 km/h = 70 km/h
c)
s = 300 km
t = 6h
v = s/t = 300 km : 6h = 300/6 km/h = 50 km/h
d)
s = 300 km
t = 3h
v = s/t = 300 km : 3h = 300/3 km/h = 100 km/h
e)
s = 100 km
t = 2h
v = s/t = 100 km : 2h = 100/2 km/h = 50 km/h
f)
s = 300 km
t = 4h
v = s/t = 300 km : 4h = 300/4 km/h = 75 km/h
g)
s = 400 km
t = 5h
v = s/t = 400 km : 5h = 400/5 km/h = 80 km/h
h)
s = 360 km
t = 4h
v = s/t = 360 km : 4h = 360/4 km/h = 90 km/h
i)
s = 560 km
t = 7h
v = s/t = 560 km : 7h = 560/7 km/h = 80 km/h
