Question

in a household, five tube light of 40w each are used for 5 hours and an electric press of 500w for 4 hours everyday . calculate the total electrical energy consumed by the tube light and press in a month of 30days?​

Answer 1

5 bulbs of 40W each used for 5hr : 5*40w*5/1000

therefore 5*40*5/1000= 1000/1000=1kwh

electric press for 4 hr and 500w : 4*500*1/1000=2kwh

total energy for 30 days : 1*30 =30 units for bulbs

total energy for electric press for 30 days :2*30=60 units

total energy = 30+60=90units

Answer 2

Answer:

66000 Wh OR 66 kWh OR 66 Units

Explanation:

Electrical Energy consumed by 5 Tube Lights in 30 days:

5 X 40 X 5 X 30= 200 X 30 = 5 X 6000 = 30000 Wh

= 30 kWh

= 30 Units

Electrical energy consumed by Electric Press in 30 days:

500 X 4 X 30 = 2000 X 30 = 60000 Wh

= 60 kWh

= 60 Units

Total energy consumed

= 30000 + 60000 = 90000 Wh

OR

= 30 + 60 = 90 kWh

OR

= 30 + 60 = 90 Units

# 1000 W (1kW) of power consumed in 1 hour = 1 Unit