Final answer:
The cost of using a 2kW electric motor for two hours daily for the month of September at Rs. 6 per unit is Rs. 720.
Step-by-step explanation:
To calculate the cost of using a 2kW electric motor for two hours daily for the month of September, we first need to calculate the total energy consumed in kilowatt-hours (kWh).
September typically has 30 days, so we multiply the power rating of the motor by the number of hours used per day and then by the number of days in September.
Energy consumed (kWh) = Power (kW) × Time (hours/day) × Number of days
Energy consumed (kWh) = 2kW × 2 hours/day × 30 days
Energy consumed (kWh) = 120 kWh
Next, we multiply the total energy consumed by the cost per unit of electricity.
Cost (Rs.) = Energy consumed (kWh) × Cost per unit (Rs./kWh)
Cost (Rs.) = 120 kWh × 6 Rs./kWh
Cost (Rs.) = 720 Rs.
Therefore, the cost of using the motor for two hours daily for the month of September is Rs. 720.