Jawaban:
Pembahasan
Untuk menyelesaikan soal ini kita gunakan rumus energi listrik :
Energi space listrik equals daya space listrik cross times waktu
Lampu pijar 40 W menyala 5 jam setiap hari selama 1 bulan
table attributes columnalign right center left columnspacing 0px end attributes row E equals cell open parentheses 40 space straight W close parentheses open parentheses 5 space jam close parentheses open parentheses 30 close parentheses end cell row blank equals cell 6 space kWh end cell end table
Lima lampu jadi 30 kWh.
Setrika listrik 350 W menyala 6 jam selama 1 bulan
table attributes columnalign right center left columnspacing 0px end attributes row E equals cell open parentheses 350 space straight W close parentheses open parentheses 6 space jam close parentheses open parentheses 30 close parentheses end cell row blank equals cell 63 space kWh end cell end table
TV 150 W menyala 6 jam setiap harinya selama 1 bulan
table attributes columnalign right center left columnspacing 0px end attributes row E equals cell open parentheses 150 space straight W close parentheses open parentheses 6 space jam close parentheses open parentheses 30 close parentheses end cell row blank equals cell 27 space kWh end cell end table
Radio 30 W digunakan 2 jam setiap harinya selama 1 bulan
table attributes columnalign right center left columnspacing 0px end attributes row E equals cell open parentheses 30 space straight W close parentheses open parentheses 2 space jam close parentheses open parentheses 30 close parentheses end cell row blank equals cell 1 comma 8 space kWh end cell end table
Pompa air 125 W dipakai 4 jam setiap harinya selama 1 bulan
table attributes columnalign right center left columnspacing 0px end attributes row E equals cell open parentheses 125 space straight W close parentheses open parentheses 4 space jam close parentheses open parentheses 30 close parentheses end cell row blank equals cell 15 space kWh end cell end table
Kulkas 120 W dipakai sepanjang hari selama 1 bulan
table attributes columnalign right center left columnspacing 0px end attributes row E equals cell open parentheses 120 space straight W close parentheses open parentheses 24 space jam close parentheses open parentheses 30 close parentheses end cell row blank equals cell 86 comma 4 space kWh end cell end table
Total energi listrik selama 1 bulan :
table attributes columnalign right center left columnspacing 0px end attributes row cell E subscript t o t a l end subscript end cell equals cell 30 plus 63 plus 27 plus 1 comma 8 plus 15 plus 86 comma 4 end cell row blank equals cell 223 comma 2 space kWh end cell end table
Biaya total selama 1 bulan :
table attributes columnalign right center left columnspacing 0px end attributes row cell B i a y a end cell equals cell E subscript t o t a l end subscript cross times 1.000 end cell row blank equals cell 223 comma 2 cross times 1.000 end cell row blank equals cell 223.200 space rupiah end cell end table
Jadi, biaya listrik selama satu bulan sebesar 223.200 rupiah.
Penjelasan:
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