In a household, $5$ tube lights of $40\, W$ each are used for $5$ hours and an electric press of $500 \,W$ for $4$ hour everyday. Calculate the total energy consumed by the tube lights and press in a month of $30$ days.
In a household, $5$ tube lights of $40\, W$ each are used for $5$ hours and an electric press of $500 \,W$ for $4$ hour everyday. Calculate the total energy consumed by the tube lights and press in a month of $30$ days.
Electrical energy consumed by $5$ tube lights of $40 W$ each for $5$ hours per day
$=5 \times 40 \times 5$
$=1000 Wh =1 kWh$
Electrical energy consumed by electric press of $500 W$ for $4$ hours per day
$=500 \times 4=2000 Wh =2 kWh$
Total electrical energy consumed per day
$=1 kW h +2 kW h =3 kWh$
Total electrical energy consumed in a month of $30$ days
$E=3 kWh \times 30=90 kW h$
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