What percentage of families in the city have television?
Statements: I. In the city, 50% of the families own houses.
Statements: II. In the city, 25% of the house owners also own televisions.
An electricity utility company charges ₹7 per kWh. If a 40-watt desk light is left on for 10 hours each night for 180 days, what would be the cost of energy consumption? If the desk light is on for 2 more hours each night for the 180 days, what would be the percentage-increase in the cost of energy consumption?