Question

a bulb of 9 watt is running for 6 hours a day then what will be the unit consumption of bulb and also what will be the bill if 1 unit = ₹5​

Answer 1

AnsweR :

⇒Energy = Power * time

⇒Energy = 9/1000 * 6

⇒Energy = 0.009 * 6

⇒Energy = 0.054 kWh

_______________

Amount = 0.054 * 5

⇒Amount = Rs. 0.27

Answer 2

1kwh=1000w
1w=1/1000kw
9w=9/1000kw
9w=0.009kw
Commercial unit of energy=kWh
So 0.009x6=0.054units
1 is given that 1unit =₹5
So 0.054x5
=0.27₹