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Nadya
@Nadya
May 2019
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Bonjour.
Pouvez vous m'aider pour mon exercice car je suis totalement perdue, je n'arrive pas à faire cet exercice.
Merci à vous tous pour votre aide.
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A) temps où la lampe est allumée = 2 x 24 x 365 =
17 520 heures
consommation halogène = 75 x 17 520 = 1 314 000 W =
1314 kW
consommation LED = 10 x 17 520 = 175 200 =
175.2 Kw
2) Coût halogène = 1 314 x 0.18 = 236.52 €
Coût LED = 175.2 x 0.18 = 31.536
Economie = 236.52 - 31.536 =
204.984 €
3) 30 000 : 2 000 = 15
on aura acheté 15 ampoules halogène
15 x 2.25 = 33.75
33.75 - 16.50 = 17.25
on aura économisé 17.25 € sur l'achat
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Verified answer
A) temps où la lampe est allumée = 2 x 24 x 365 = 17 520 heuresconsommation halogène = 75 x 17 520 = 1 314 000 W = 1314 kW
consommation LED = 10 x 17 520 = 175 200 = 175.2 Kw
2) Coût halogène = 1 314 x 0.18 = 236.52 €
Coût LED = 175.2 x 0.18 = 31.536
Economie = 236.52 - 31.536 = 204.984 €
3) 30 000 : 2 000 = 15
on aura acheté 15 ampoules halogène
15 x 2.25 = 33.75
33.75 - 16.50 = 17.25
on aura économisé 17.25 € sur l'achat