Two 60-watt bulbs and two 40-watt fans are kept ON for 6 hours a day. If the electricity charges are Rs. 5 per unit, the electricity bill for 30 days will be Rs.

Correct option is A

To calculate the electricity bill:
1. Total power consumption per day:
o Two 60-watt bulbs = 2×60=1202 \times 60 = 1202×60=120 watts
o Two 40-watt fans = 2×40=802 \times 40 = 802×40=80 watts
o Total power consumption = 120+80=200120 + 80 = 200120+80=200 watts
2. Convert watts to kilowatts (kW):
o 200200200 watts = 200/1000=0.2200/1000 = 0.2200/1000=0.2 kW
3. Calculate the energy consumed per day in units (kWh):
o Energy consumed per day = 0.20.20.2 kW ×6\times 6×6 hours = 1.21.21.2 units
4. Energy consumed in 30 days:
o 1.21.21.2 units/day ×30\times 30×30 days = 363636 units
5. Calculate the total cost:
o Total cost = 363636 units ×Rs.5\times Rs. 5×Rs.5 per unit = Rs. 180