Question

An electric heater draws a current of 10A from a 220V supply using heater for 5 hours everyday for 30 days and cost of unit is Rs. 5.20 (1Kwh).

Answer 1

Answer:

1716 rupees

Explanation:

Given :

• Current drawn by the electric heater = I = 10 Amperes

• Time current is drawn for = t = 5 hours

• Cost of 1 unit = 5.20 rupees

• Potential difference or voltage = 220 volts

To find :

• Monthly bill

Electricity consumed per day = V×I×T

Electricity consumed per day = 220×10×5

Electricity consumed per day = 11,000 WH

Electricity consumed per month = 11,000×30 = 3,30,000 WH

3,30,000 watt hours = 330 KWH

Cost = 330×5.2

Cost = 1716 rupees

The monthly bill is 1716 rupees

Answer 2

Answer:

Given:

• An electric heater draws a current of 10A from a 220V supply using heater for 5 hours everyday for 30 days.

Find:

• Cost of unit is Rs. 5.20 (1Kwh).

Know terms:

1. Current = (I)
2. Time = (t)
3. Voltage = (V)
4. Electricity per day = (a)

Using formula:

☆ ${\sf{\underline{\boxed{\orange{\sf{a = V \times I \times T}}}}}}$

Calculations:

⇒ $\bold{a = 220 \times 10 \times 5}$

⇒ $\bold{a = 11000 \: WH}$

⇒ $\bold{a = 11000 \times 30}$

⇒ ${\sf{\underline{\boxed{\red{\sf{330000 \: WH}}}}}}$

⇒ $\bold{330000 \: WH = 330 \: KWH}$

⇒ $\bold{330 \times 5.2}$

⇒ ${\sf{\underline{\boxed{\red{\sf{1716}}}}}}$

Therefore, 1716 rupees is the monthly bill.