sebuah rumah menggunakan peralatan listrik 6 lampu 5 watt, 2 buah tv 100 watt, mesin cuci 300 watt. Jika 1 KWH 1500, berapa biaya listrik jika setiap harinya di

nlampu = 6
Plampu = 5 Watt
ntv = 2 buah
Ptv = 100 Watt
ncuci = 1
Pcuci = 300 Watt
1 Kwh = Rp. 1.500,-
t = 3 Jam

Wh = P × n × t
Whlampu = 5 × 6 × 3 = 90 Wh
Whtv = 100 × 2 × 3 = 600 Wh
Whcuci = 300 × 1 × 3 = 900 Wh
Whtot = 1.590 Wh = 1,59 Kwh
Wh(30hari) = 1,59 × 30 = 47,7 Kwh
Biaya(30hari) = 1.500 × 47,7 = Rp. 71.550,-