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W₁=Pt-praca telewizora
W₁=80W×6h
W₁=480Wh
W₂=1800W×1h=1800Wh
W=2280Wh=2280W×3600s=8208000J
2280Wh=2,28kWh
2,28kWh×0,5=1,14zł