Question

An electric heater draws a current of 10 A from a 220 v supply. what is the cost of using the heater for 5 hours everyday for 30 days if the cost of 1 unit is Rs.5.20​

Answer 1

Answer:

Energy consumed = power×time

By applying, P = V×I

= 220×10

= 2200Whr.

Energy consumed by a heater = 2200×5 = 11000Whr = 11KWh.

Energy consumed in 30 days = 11×30 = 330KWh

Cost = Unit×Cost per unit

= 330×5.20

= 1716rupees.

Answer 2

Given :

• Current drawn =10 A
• Voltage = 220 V
• Time = 5 hr

To find :

• Cost of using the heater

Solution :

★ By applying:-

→ Electric energy consumed = 2200 × 5

→ Electric energy consumed = 11000 Wh

★ 11000Wh = 11KWh

→ Energy consumed in 30 days = 11 × 30

→ Energy consumed in 30 days = 330 KWh

★ We know:-

• Cost = Unit × Cost/unit

→ Cost = 330 × 5.20

→ Cost = ₹ 1716

•°• Cost = ₹ 1716