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- Energi
t = 3 h [h = jam (hour)]
V = 220 V
i = 2 A
h = Rp 100 / kWh
B = ___ ?
Energi yang digunakan
W = V i t
= 220 · 2 · 3
= 1320 Wh = 1,32 kWh
Biaya listrik
B = W h
=1,32 · 100
= Rp 132 ← jawaban