Question

An electric refrigerator rated 500 W operates 10 hr per day. What is the cost of the energy to operate it for 30 days at Rs. 4.00 per kWh?

• A. Rs. 600
• B. Rs. 400
• C. Rs. 500
• D. Rs. 800

Answer 1

The correct option is A

Rs. 600

E = P × t = 0.5 × 10 × 30 = 150 kWh

Cost of energy = 150 × 4 = Rs. 600