Question

five bulbs each rated at 40w-220V are used 5 hours daily on 20V line. How many units of electric energy is consumed in a month of 30 days​

Answer 1

Explanation:

Watt*time=joules

40*5*30=6000 joules

Answer 2

Explanation:

5×40=200

5×220=1100

1 day on 20v line 5 hours

so 30 days =200 + 1100=1300

=5 ×20v line =100 v