Answer:
The country is saved 1.0647×10^10 kWh of electricity per year.
Step-by-step explanation:
Power saved per household = 60 W - 10 W = 50 W = 50/1000 = 0.05 kW
Power saved in 117,000,000 households = 117,000,000 × 0.05 kW = 5,850,000 kW
Number of hours the bulb is used per week = 35 hours
Number of hours the bulb is used per year (52 weeks) = 52 × 35 = 1,820 hours
Quantity of electricity saved per year = 5,850,000 kW × 1,820 hours = 1.0647×10^10 kWh
