Svp vous pouver maider dm maths

Exercice 2.1
b) v= 620/4= 155 km/h
c) v= 12/0,5=  24 km/h
d) v= 1200/3= 400 m/s
e) v= 5000/120= 41,67 m/s

Exercice 2.1

b) V = 620/4
V = 155 km.h

c) V = 12/0,5
V = 24 km.h

d) 1200/3
V = 400 m.s
1 m.s = 3,6 km.h
400 x 3,6 = 1440
V = 1440 km.h

e) 120 s = 2 min
5 : 2 = 2,5 km.min
2,5 km = 2500 m
V =  2500 m.min
V = 150 km.h


Exercice 2.2

b) D = 90 x 3,5
D = 31,5 km

c) D = 8 x 60
D = 480 m

d) D = 12 x 9,5
D = 114 m

e) D = 15,3 x 1,5
D = 22,95 km

Exercice 2.3

b) t = 3 h
D = 90 x 3
D = 270 km

c) 1 h = 3600 s
t = 2 h
D = 70 x 2
D = 140 km

d) t = 3600 sec
D = 0,5 x 3600
D = 1800  km

e) t = 10 800 sec
D = 4,3 x 10 800
D = 46 440 m
D = 46,440 km

Exercice 2.5

b) 20000 m = 20 km
t = 20/5
t = 4 h

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