Question

There are 5 tube lights each of 40 W in a house.these are used on an average for 5 hours per day.in addition there is an immersion heater ofor 1500W used on an average for 1 hour per day .the number of units of electricity are consumed in a month is

Answer 1

Answer:

Explanation:

5 tubelights of 40 watt used for 5 hrs

kwh = 5×40×5÷1000=1 kwh

1 kwh for one day so for 30 days 30 kwh

similarly 1500 watt immersion heater for 1 hr a day

kwh = 1500×1÷1000=1.5kwh

1.5 kwh for one day so for 30 days , 1.5×30=45 kwh

so total kwh consumed in a month = 45 plus 30

= 75 kwh=75 units