Question

In a household 5 tubelights of 40 W each are used for 5 hours and an electric press of 500 W for 4 hours everyday . Calculate the total electrical energy consumed by the tubelights and press in a month of 30 days.​

Answer 1

Answer:

Here is ur answer:

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

Explanation:

5 tube of 40w each =40×5=200w/h

=200÷1000uwh

=0.2uwh

⇒ Electric press of 500w=500×4=2000w/h

=2uw

Now,

⇒ Power consumption of 5 tuber in 30 days =(30×0.2)

=6uwh

⇒ Power consumption of 1 press in 30 days =(30×0.2)

=60uwh

⇒ Total energy consumption by tube lights and press in 30 days =(60+6)

=66uwh

Hence, the answer is 66 units.