Class 9 Exam > Class 9 Questions > Calculate the electricity bill amount for a m...
Start Learning for Free
Calculate the electricity bill amount for a month of 31 days , if the following devices are used as specified : (a) 3 bulbs of 40 w for 6 hours (b) 4 tubelights of 50 w for 8 hours (c) A tv of 120 w for 6 hours?
Most Upvoted Answer
Calculate the electricity bill amount for a month of 31 days , if the ...
Community Answer
Calculate the electricity bill amount for a month of 31 days , if the ...
Calculation of Electricity Bill Amount for a Month
Electricity bill is calculated based on the units of electricity consumed by the devices in a month. The unit of electricity is measured in kilowatt-hour (kWh). The formula to calculate the electricity bill is:
Electricity bill amount = Units consumed x Rate per unit
The rate per unit varies from state to state and is set by the electricity board. Let us assume that the rate per unit is Rs. 5.
Devices and their Usage
The devices used and their usage in hours per day are:
(a) 3 bulbs of 40 W for 6 hours
(b) 4 tubelights of 50 W for 8 hours
(c) A TV of 120 W for 6 hours
Calculation of Units Consumed
The units consumed by each device can be calculated using the formula:
Units consumed = Power of device (in kW) x Usage (in hours) / 1000
(a) Units consumed by 3 bulbs of 40 W for 6 hours
Power of bulbs = 3 x 40 = 120 W = 0.12 kW
Usage = 6 hours
Units consumed = 0.12 kW x 6 hours / 1000 = 0.72 kWh
(b) Units consumed by 4 tubelights of 50 W for 8 hours
Power of tubelights = 4 x 50 = 200 W = 0.2 kW
Usage = 8 hours
Units consumed = 0.2 kW x 8 hours / 1000 = 1.6 kWh
(c) Units consumed by a TV of 120 W for 6 hours
Power of TV = 120 W = 0.12 kW
Usage = 6 hours
Units consumed = 0.12 kW x 6 hours / 1000 = 0.72 kWh
Total units consumed = 0.72 + 1.6 + 0.72 = 3.04 kWh
Calculation of Electricity Bill Amount
Electricity bill amount = Units consumed x Rate per unit
= 3.04 kWh x Rs. 5/kWh
= Rs. 15.20
Therefore, the electricity bill amount for a month of 31 days, assuming the usage as mentioned, would be Rs. 15.20.
Electricity bill is calculated based on the units of electricity consumed by the devices in a month. The unit of electricity is measured in kilowatt-hour (kWh). The formula to calculate the electricity bill is:
Electricity bill amount = Units consumed x Rate per unit
The rate per unit varies from state to state and is set by the electricity board. Let us assume that the rate per unit is Rs. 5.
Devices and their Usage
The devices used and their usage in hours per day are:
(a) 3 bulbs of 40 W for 6 hours
(b) 4 tubelights of 50 W for 8 hours
(c) A TV of 120 W for 6 hours
Calculation of Units Consumed
The units consumed by each device can be calculated using the formula:
Units consumed = Power of device (in kW) x Usage (in hours) / 1000
(a) Units consumed by 3 bulbs of 40 W for 6 hours
Power of bulbs = 3 x 40 = 120 W = 0.12 kW
Usage = 6 hours
Units consumed = 0.12 kW x 6 hours / 1000 = 0.72 kWh
(b) Units consumed by 4 tubelights of 50 W for 8 hours
Power of tubelights = 4 x 50 = 200 W = 0.2 kW
Usage = 8 hours
Units consumed = 0.2 kW x 8 hours / 1000 = 1.6 kWh
(c) Units consumed by a TV of 120 W for 6 hours
Power of TV = 120 W = 0.12 kW
Usage = 6 hours
Units consumed = 0.12 kW x 6 hours / 1000 = 0.72 kWh
Total units consumed = 0.72 + 1.6 + 0.72 = 3.04 kWh
Calculation of Electricity Bill Amount
Electricity bill amount = Units consumed x Rate per unit
= 3.04 kWh x Rs. 5/kWh
= Rs. 15.20
Therefore, the electricity bill amount for a month of 31 days, assuming the usage as mentioned, would be Rs. 15.20.
Attention Class 9 Students!
To make sure you are not studying endlessly, EduRev has designed Class 9 study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in Class 9.
|
Explore Courses for Class 9 exam
|
|
Similar Class 9 Doubts
Top Courses for Class 9View all
Calculate the electricity bill amount for a month of 31 days , if the following devices are used as specified : (a) 3 bulbs of 40 w for 6 hours (b) 4 tubelights of 50 w for 8 hours (c) A tv of 120 w for 6 hours?
Question Description
Calculate the electricity bill amount for a month of 31 days , if the following devices are used as specified : (a) 3 bulbs of 40 w for 6 hours (b) 4 tubelights of 50 w for 8 hours (c) A tv of 120 w for 6 hours? for Class 9 2024 is part of Class 9 preparation. The Question and answers have been prepared according to the Class 9 exam syllabus. Information about Calculate the electricity bill amount for a month of 31 days , if the following devices are used as specified : (a) 3 bulbs of 40 w for 6 hours (b) 4 tubelights of 50 w for 8 hours (c) A tv of 120 w for 6 hours? covers all topics & solutions for Class 9 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Calculate the electricity bill amount for a month of 31 days , if the following devices are used as specified : (a) 3 bulbs of 40 w for 6 hours (b) 4 tubelights of 50 w for 8 hours (c) A tv of 120 w for 6 hours?.
Calculate the electricity bill amount for a month of 31 days , if the following devices are used as specified : (a) 3 bulbs of 40 w for 6 hours (b) 4 tubelights of 50 w for 8 hours (c) A tv of 120 w for 6 hours? for Class 9 2024 is part of Class 9 preparation. The Question and answers have been prepared according to the Class 9 exam syllabus. Information about Calculate the electricity bill amount for a month of 31 days , if the following devices are used as specified : (a) 3 bulbs of 40 w for 6 hours (b) 4 tubelights of 50 w for 8 hours (c) A tv of 120 w for 6 hours? covers all topics & solutions for Class 9 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Calculate the electricity bill amount for a month of 31 days , if the following devices are used as specified : (a) 3 bulbs of 40 w for 6 hours (b) 4 tubelights of 50 w for 8 hours (c) A tv of 120 w for 6 hours?.
Solutions for Calculate the electricity bill amount for a month of 31 days , if the following devices are used as specified : (a) 3 bulbs of 40 w for 6 hours (b) 4 tubelights of 50 w for 8 hours (c) A tv of 120 w for 6 hours? in English & in Hindi are available as part of our courses for Class 9.
Download more important topics, notes, lectures and mock test series for Class 9 Exam by signing up for free.
Here you can find the meaning of Calculate the electricity bill amount for a month of 31 days , if the following devices are used as specified : (a) 3 bulbs of 40 w for 6 hours (b) 4 tubelights of 50 w for 8 hours (c) A tv of 120 w for 6 hours? defined & explained in the simplest way possible. Besides giving the explanation of
Calculate the electricity bill amount for a month of 31 days , if the following devices are used as specified : (a) 3 bulbs of 40 w for 6 hours (b) 4 tubelights of 50 w for 8 hours (c) A tv of 120 w for 6 hours?, a detailed solution for Calculate the electricity bill amount for a month of 31 days , if the following devices are used as specified : (a) 3 bulbs of 40 w for 6 hours (b) 4 tubelights of 50 w for 8 hours (c) A tv of 120 w for 6 hours? has been provided alongside types of Calculate the electricity bill amount for a month of 31 days , if the following devices are used as specified : (a) 3 bulbs of 40 w for 6 hours (b) 4 tubelights of 50 w for 8 hours (c) A tv of 120 w for 6 hours? theory, EduRev gives you an
ample number of questions to practice Calculate the electricity bill amount for a month of 31 days , if the following devices are used as specified : (a) 3 bulbs of 40 w for 6 hours (b) 4 tubelights of 50 w for 8 hours (c) A tv of 120 w for 6 hours? tests, examples and also practice Class 9 tests.
|
|
Explore Courses for Class 9 exam
|
|
Suggested Free Tests
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© EduRev
|
Education Revolution
|
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup