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Sagot :

STELLAPHILIPPE2

Explications étape par étape :

            1800m/min

a/   30m/s = ( 30 × 60 ) / 60s = 1800m/min

b/  0,5km/h = 500m/h ≅ 8,33m/min

c/  108km/h = [tex]\frac{108km}{1h} . \frac{1h}{60min} .\frac{1000m}{1km}[/tex] = 1800m/min

d/  1,8m/s = 108m/min

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