Odpowiedź :
Odpowiedź:
V = s/t
s = V * t
1 fragment ==> V = 20 km/h, t = 5 min = 1/12 h
s1 = 20 * 1/12 = 1 i 2/3 [km]
2 fragment ==> V = 30 km/h, t = 10 min = 1/6 h
s2 = 30 * 1/6 = 5 [km]
3 fragment ==> V = 60 km/h, t = 30 min = 1/2
s3 = 60 * 1/2 = 30 [km]
4 fragment ==> korzystamy z fragmentu 2
10 min jadąc z V = 30 km/h ==> przejedziemy 5 km, więc
5 min jadąc z V = 30 km/h ==> s4 = 2,5 [km]
fragment 5 ==> V = 10 km/h, t = 5 min = 1/12
s5 = 10 * 1/12 = 10/12 [km]
SUMA = 1 i 2/3 + 5 + 30 + 2,5 + 10/12 = 37,5 + 1 i 2/3 + 10/12 = 39,1(6) + 10/12
= około 40 km