Question

heater is rated at 5 KW calculate the cost of energy consumed by 8 in 30 days if it is Run for 2 hours daily the cost of 1 kwh is price at rupees 4.20

Answer 1

multiply the rate of power i.e kw , cost , no. of days, no.of hours it is used,

Answer 2

power(p)=5kw
time =2×30
=60
electric power =energy consumed÷timin hours
energy consumed=electric power×time in hours
energy consumed =5×60
=300
cost of energy =300×4.20
=1260