tolonh jawab yang nomer 42

42.
8 lampu = 8 x 20 x 12 = 1920 Wh
1 tape = 1 x 50 x 4 = 200 Wh
1 televisi = 1 x 100 x 6 = 600 Wh
1 setrika = 300 x 3 = 900 Wh
1 rice cooker = 350 x 2 = 700 Wh
kulkas = 100 x 24 = 2400 Wh

total seluruh =
1920 + 200 + 600 + 900 + 700 + 2400 = 6720 Wh = 6,72 Kwh per hari

harga tiap kwh
6,72 x 1500 = Rp. 10.080 per hari

harga per bulan
10.080 x 30 hari = Rp. 302.400