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Sagot :

bonjour

v = d / t

donc v x t = d

donc t = d / v

ici d = 149 x 10⁶ km = 1,49x10⁸ km

et v = 3 x 10⁸ m/s

soit v = 3 x 10⁵ km/s = (3x10⁵) x 3600 km/h = 1,08x10⁹ km/h

donc t = 1,49x10⁸ : 1,08x10⁹ = 1,38x10⁻¹ h = 0,138h = 8,28min

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