Question

A 2kW heater a 200W tv and 300 W lamps are switched on from 6pm to 10pm what is the total coast at Rs 5.5 per kWh

Answer 1

power = 2000+300+200=2500w=2.5kw

time=4hours

commecial unit= 2.5*4=10kwh

price =10*5.50=55rs.

Answer 2

Total power = 2000+200+300
= 2500W = 2.5kW
Hrs = 4
Total cost = 5.5*2.5*4
=55 rupees