Question

How much energy in Kilowatt hour is consumed in operating ten 50 watt bulbs for 10 hours per day in a month (30 days)

• A. 1500
• B. 15.000
• C. 15
• D. 150

Answer 1

Answer: (D)

150

Answer 2

By using $n = \frac{\text{Total Watt} \times \text{ Total time}}{\text{1000}}$

⇒ $n = \frac{(50 \times 10) \times (10 \times 30)}{1000} = 150$