Question

In a premise $5$ bulbs each of $100W$, $2$ fans each of $60W.2A.Cs$ each of $1.5kW$ are used for $5h$ per day. Find :
(a) total power consumed per day,
(b) total power consumed in $30$ days,
(c) total electrical energy consumed in $30$ days.
(d) the cost of electricity at the rate of $Rs.6.25$ per unit.

Answer 1

Power consumed by :
$5$ bulbs$=5\times 100=500W$
$2$ fans $=2\times 60=120W$
$2$ A.C $=2\times 1.5\times 1000=3000W$
(b) Total power consumed per day=$3620W$
(b) Total power consumed in $30$ days $=\frac{3620}{1000}\times 30=108.6kw$
(c) Electric energy is used for $5$ h per day.
Total electrical energy consumed in $30$ day.
(d) Cost of electricity =$P\times t=108.6\times 5=543kWh$
$=543\times 6.25=Rs3393.75$