An electric heater rated $1200\, W$ operates $2$ hour per day. Find the cost of the energy required to operate it for $30$ days at ₹ $5.00$ per unit.
An electric heater rated $1200\, W$ operates $2$ hour per day. Find the cost of the energy required to operate it for $30$ days at ₹ $5.00$ per unit.
Power of the electric heater $=1200 W$
Number of hours per day heater is used $=2$
$\therefore \quad$ Energy consumed per day $=1200 \times 2$
$=2400 W$
Total energy consumed in $30$ days $=2400 \times 30$
$=72000 W$
$=72 kW$
$=72$ units
Cost of energy $=$ Total no. of units $\times$ Rate
$=72 \times 5$
$=$ ₹ $360$
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