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Comparing Quantities in One Shot (Part 1) | Maths - Class 8th | Umang | Physics Wallah

Physics Wallah Foundation・80 minutes read

The text discusses various concepts in Chapter 25 of Physics and Mathematics, emphasizing proportions, percentages, profit, loss, interest, and comparison of quantities, with examples for better understanding. It delves into calculating percentages, discussing profit and loss scenarios, relationships between cost price and selling price, and understanding taxes and discounts in pricing for accurate business transactions.

Insights

  • The chapter in Physics and Mathematics covers various topics like percentages, profit and loss, and Simple Interest and Compound Interest, emphasizing the importance of comparing quantities and understanding relative sizes.
  • It provides detailed examples and explanations on calculating percentages, profit percentages, and understanding the relationship between cost price, selling price, and final prices, highlighting the significance of accurate calculations in business transactions and the impact of taxes on pricing.

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Recent questions

  • What topics are covered in Chapter 25 of Physics and Mathematics?

    Concepts include fibers, percentage, profit and loss, Simple Interest, and Compound Interest.

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Summary

00:00

Chapter 25: Physics and Mathematics Concepts Explained

  • The chapter being discussed is Chapter 25 of Physics and Mathematics, focusing on various concepts.
  • The chapter is considered easy and requires understanding of certain concepts and formulas.
  • The chapter is to be covered in one day, specifically on 25th February.
  • The topics covered in the chapter include Tahir's words, fibers, percentage, profit and loss, and Simple Interest and Compound Interest.
  • The chapter emphasizes comparing quantities and understanding relative sizes.
  • The text discusses the importance of division in comparing quantities.
  • It explains the concept of proportion and provides examples for better understanding.
  • The text delves into the meaning and calculation of percentages.
  • It clarifies that there is no unit for percentages.
  • The chapter concludes with a focus on expressing fractions as percentages.

16:14

Understanding Percentages: Units and Calculations

  • Percentages do not have units, even percentages do not have units.
  • 14% will be charged for something, frustration doesn't come to a centimeter.
  • The whole scientific number is there, green starts with points percentage.
  • The percentage is directly written, for example, for acid fractionation.
  • The percentage of deposit is 40%, the answer is 40%.
  • If the denominator is hundred, then the answer is 20%.
  • The numerator is the sensible weight, this is the percentage.
  • If the denominator was hundred, then there would be a new minister.
  • 125% will be charged again, simplify it a bit and the answer will come.
  • 90% of 500 is equal to your marks, total marks in all the papers are 500.

34:49

Survey reveals majority prefer science, math interest.

  • People were surveyed on their preference for science, with a majority liking science.
  • The total number of students surveyed was significant.
  • The text discusses the duplication of AT percentage in students.
  • There is a mention of students' interest in Acidity or Pretty on Scent.
  • A specific number of students are highlighted, indicating a detailed analysis.
  • The text delves into the interest of students in mathematics.
  • A specific percentage of students liking mathematics is discussed.
  • The text involves calculations and conversions related to percentages and numbers.
  • The topic shifts to the increase and decrease in the number of people visiting on different days.
  • The concept of profit and loss is introduced, focusing on cost price and selling price.

53:35

Cost Price and Selling Price Relationship Formula

  • Some profit was made buying jeans for Rs 3000 at Rs 3200.
  • Meena incurred a loss in tuition fees, with the cost price of jeans being Rs 3000.
  • A profit was made, with the cost price being more than Rs 3000.
  • The selling price was Rs 212 more than the cost price.
  • The rescue team earned Rs 200, following the same principle.
  • The text discusses the relationship between cost price and selling price.
  • The cost price was higher than the selling price for a ring.
  • The cost price of a daughter bought in 2008 was Rs 2800, sold for Rs 3000.
  • The profit was calculated at 4% of the cost price.
  • The formula for calculating loss was explained as 210 multiplied by the game percentage.

01:10:29

Understanding Cost Price and Profit in Business

  • The text discusses the concept of cost price and profit in a business context.
  • It mentions calculating profit as a percentage of the cost price.
  • Explains the relationship between profit and selling price.
  • Provides examples of calculating profit percentages.
  • Discusses the impact of losses on cost price and profit.
  • Mentions the process of calculating profit and loss percentages.
  • Talks about the importance of understanding cost price and profit in transactions.
  • Provides examples of calculating total cost price and profit.
  • Discusses the process of determining selling price based on profit.
  • Mentions the importance of accurate calculations in business transactions.

01:29:21

"Mastering Pricing: Profit, Taxes, Discounts, Selling"

  • The text discusses calculating profit percentages and understanding the symbols of percentage.
  • It mentions the importance of identifying profit and loss in various scenarios.
  • The text delves into the concept of discounts and marked prices.
  • It explains the process of determining selling prices after applying discounts.
  • There is a focus on understanding taxes, including GST, and their implications on pricing.
  • The text emphasizes the significance of cost prices and their impact on final prices.
  • It discusses the calculation of final prices after considering taxes.
  • The text highlights the importance of understanding the relationship between initial prices, taxes, and final prices.
  • It touches on the concept of profit sharing and its application in different scenarios.
  • The text concludes with a question about determining the selling price based on the final price.

01:48:39

"Complex Calculation Determines Final Oil Price"

  • The final price of the oil sold was determined through a complex calculation involving various factors such as Bloody Marys, Rate A+B, World Tour Finals, and specific numerical values like 12.1 and 12:00 Plus, resulting in a final price of 112 B.Ed appointed hundred.
  • The text also hints at the inclusion of taxes in the final cost, with a reference to a specific amount of 3300, indicating that the price of the air cooler would have been the final price, emphasizing the importance of understanding the tax implications in pricing calculations.
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