Question

the cost of energy for using a heater for 8 hours per day in january is rs 400 at a cost of 2.5rs/unit then find the power of heater​

Answer 1

We have,

• Cost of per unit electricity = Rs 2.5
• Cost for electricity bill = Rs. 400
• Total time = 8 hours
• Month = January = 31 days

Now we know that,

• Cost of Bill = Power consumed × time taken × per unit charge / 1000

So,

• 400 = power × 8 × 31 × 2.5/1000
• 400 × 1000 × 10/8 × 31 × 25 = Power
• 10 × 2 × 1000/31 = Power
• 645.16 = Power

Therefore,the total power consumed is 645.2 W

$\;$