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Assia120202
@Assia120202
May 2019
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Coucou, vous pouvez m'aidez svp je n'y arrive pas et c'est pour demain.
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loulakar
Verified answer
Bonjour,
1620 m³/h
a) en L/s puis en m³/j :
1 m³ = 1000 dm³ = 1000 L
1 h = 3600 s
1620 x 1000 / 3600 = 450 L/s
1 j = 24 h
1620 x 24 = 38880 m³/j
b) 25 h pour traverser :
Vitesse de l eau en km/h :
V = d/t
V = 50/25
V = 2 km/h
c) temps mis pour 275 m :
t = d/v
t = 0,1375 h
1 h = 60 min
t = 0,1375 x 60
t = 8,25 min
1 min = 60 s
t = 0,25 x 60
t = 15 s
Donc elle met : 8 min et 15 s
1 votes
Thanks 1
Assia120202
merci beaucoup !
loulakar
De rien ;)
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Verified answer
Bonjour,1620 m³/h
a) en L/s puis en m³/j :
1 m³ = 1000 dm³ = 1000 L
1 h = 3600 s
1620 x 1000 / 3600 = 450 L/s
1 j = 24 h
1620 x 24 = 38880 m³/j
b) 25 h pour traverser :
Vitesse de l eau en km/h :
V = d/t
V = 50/25
V = 2 km/h
c) temps mis pour 275 m :
t = d/v
t = 0,1375 h
1 h = 60 min
t = 0,1375 x 60
t = 8,25 min
1 min = 60 s
t = 0,25 x 60
t = 15 s
Donc elle met : 8 min et 15 s