Un photocopiure imprime 4pages en 10 secondes.Combien de temps, en minutes et seconds, met-il pour imprimer 180 pages?
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1 page = 10/4 × 180
= 10 × 45 = 450 sec.
⇒ 1 min = 60 sec.
∴ 450/60 = 7 min. et 30 sec.
= 10 × 45 = 450 sec.
⇒ 1 min = 60 sec.
∴ 450/60 = 7 min. et 30 sec.
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