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Sagot :

Réponse:

c'est 12 534

Explications étape par étape:

3 heurs= 180 minutes = 60×3

180 + 28 = 208 minutes

208 ×60 = 12 534

Bonsoir

3h = 180min

180min = 10 800s

28min = 1 680s

54s

10 800 + 1 680 + 54 = 12 534 secondes

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