Question

a house hold has a 100w lamp lighted for 2 hrs, two 60w lamp lighted for 2hrs, two 60w lamp lighted for 4hrs and an electric fan working for 8hrs a day. calculate the energy consumed for each day and the cost of Electricity consumed for one month at the rate of rs. 5 per unit​

Answer 1

Explanation:

1) electricity used by lamp = 1kWh = 1 × 100/1000 × 2 = 0.2 kWh

2) electricity used by two another lamps = 1kWh = 2 × 60/1000 × 2 = 6/25 = 0.24 kWh

3) another two lamps = 1kWh =2 × 60/1000 × 4 = 0.48kWh

the energy used by fan is not mentioned so I'm not including it but u can solve it as the same like the others

total energy consumed = 0.2+0.24+0.48=0.74 kWh in a day

the cost for a month = 30 × 0.74 × 5 = ₹111