a) t = D / v = 25 / 72 = 0,34 h soit 0,34 x 60 = 20 minutes
b)
72 / 3,6 = 20 m/s
d = v x t = 20 x 10 = 200 m
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a) t = D / v = 25 / 72 = 0,34 h soit 0,34 x 60 = 20 minutes
b)
72 / 3,6 = 20 m/s
d = v x t = 20 x 10 = 200 m