tolongb bantyin yaa hehe

LAMPU = 5 x 20w x 10jam= 1.000watt / 1kwh
TV =60w x 8jam= 480 watt/0,48kwh
Setrika = 250w x 4jam = 1.000watt/ 1kwh
1kwh+ 0,48kwh+1kwh = 2,48kwh
2,48 kWh x 30 =74,4 kWh ( D ).
Semoga bermanfaat,maaf kalo salah ^^