Question

Calculate the amount of electrical energy consumed by a 60W fan working for 10h day for 20 days. If the electrical tariff is Rs 4/ unit, find the total cost of electricity used by the fan.​

Answer 1

Answer:

• Rs 48 is the total cost of electricity used by the fan .

Explanation:

According to the Question

It is given that,

• Power ,P = 60W
• Working for 10h per day
• Total Number of days = 20

we have to calculate the total cost used by the fan in 20 days .

Firstly we calculate the Energy Consumed by the appliance.

• Energy Consumed = Power × time

On substituting the value we get

↠ Energy Consumed = 60×10×20

↠ Energy Consumed = 600×20

↠ Energy Consumed = 12000 Wh

↠ Energy Consumed = 12000/1000 Unit

↠ Energy Consumed = 12 Unit

Now, calculating the total cost of electricity used by the fan .

Total Cost = Energy Consumed × Rate

On substituting the value we get

↠ Total Cost = 12 × 4

↠ Total Cost = Rs 48

• Hence, the total cost used by the fan is Rs 48 .

Answer 2

Answer:

Given :-

• A electrical energy consumed by a 60W fan working for 10 hours per day for 20 days.
• The electrical fan is Rs 4/- unit.

To Find :-

• What is the amount of electrical energy.
• What is the total cost of electricity used by the fan.

Formula Used :-

$\clubsuit$ Energy Formula :

$\bigstar \: \: \sf\boxed{\bold{\pink{Energy =\: Power \times Time}}}\: \: \: \bigstar$

Solution :-

First, we have to find the amount of electrical energy consumed :

Given :

• Power = 60W
• Time = 10 hours per day for 20 days

According to the question by using the formula we get,

$\implies \bf Energy=\: Power \times Time$

$\implies \sf Energy =\: 60 \times (10 \times 20)$

$\implies \sf Energy =\: 60 \times (200)$

$\implies \sf Energy =\: 60 \times 200$

$\implies \sf\bold{\green{Energy =\: 12000\: Wh}}$

Now, we have to convert Wh into kWh :

$\implies \bf Energy =\: 12000\: Wh$

$\implies \sf Energy =\: \dfrac{12\cancel{000}}{1\cancel{000}}\: kWh$

$\implies \sf Energy =\: \dfrac{12}{1}\: kWh$

$\implies \sf\bold{\purple{Energy =\: 12\: kWh}}$

$\therefore$ The amount of electrical energy consumed is 12 kWh .

Now, we have to find the total cost of electricity used by the fan :

Given :

• Electric Energy = 12 kWh
• Cost per unit = Rs 4

According to the question by using the formula we get,

$\small \dashrightarrow \bf Total\: Cost =\: Electric\: Energy \times Cost\: Per\: Unit$

$\dashrightarrow \sf Total\: Cost =\: 12 \times 4$

$\dashrightarrow \sf\bold{\red{Total\: Cost =\: Rs\: 48}}$

$\therefore$ The total cost of electricity used by the fan is Rs 48 .

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