Final answer:
Yes, an electric kettle can be used under a gas stove for heating in theory, but it is not practical or safe. The electric kettle's cost of operation for 60 days, assuming 1 hour of use per day, would be 45 rupees based on the given electricity cost.
Step-by-step explanation:
To answer whether an electric kettle of 500W power can be used under a gas stove of 2kW power for heating, yes, they can be used together for heating as they are operating on different energy sources (electricity and gas respectively). However, the question may be impractical in a real-world setting as kettles are designed for electric use alone, and placing it under a gas stove could be hazardous or damaging to the kettle. For calculating the cost, we'd normally need to know the duration of use per day; however, we will consider only the kettle here for the sake of this example.
The total energy consumed by the electric kettle in a day would be Power (W) × Time (h). Assuming the kettle is used for 1 hour daily, the consumption in a day is 500W × 1h = 0.5 kWh. Over 60 days, the total energy consumed would be 0.5 kWh/day × 60 days = 30 kWh.
Given the cost is rupees 1.50 per unit (where 1 unit = 1 kWh), the total cost for 60 days would be 30 kWh × 1.50 rupees/kWh = 45 rupees.