SHORT TRICK -Adding Ingredient to Increase Concentration

Duration: 7 min

This video lesson is available to enrolled students.

Inside: a video lesson and guided study material.

Module outline

Mathematics: Ratio and Proportion (Ratios), Divisibility Rules, Data Interpretation, Mixture and Alligation, Permutation and Combination, Logarithm, Number System, HCF LCM, Sequence and Series (Series), Speed Time and Distance, Percentage, Average, Powers and Exponents (Surds and Indices), Algebra, Probability, Profit and Loss, Simple Interest and Compound Interest, Time and Work, Pipe and Cistern, Mensuration and Geometry, Mental Ability, Age Problems, Partnership, Statistics, Arithmetic, Speed Mathematics and Basic Mathematics
General Intelligence & Reasoning: Series (Number and Letter Series) (Numerical Relations and Reasoning), Coding Decoding, Data Sufficiency, Non Verbal Reasoning (Spatial Aptitude) (Spatial Reasoning) (Visual Reasoning), Syllogisms, Deductive and Inductive Reasoning (Logical Deduction and Induction) (Prepositional Reasoning), Seating Arrangements, Blood Relations, Directions (Direction Test), Analytical Reasoning (Counting Figures Reasoning), Puzzle Solving (Puzzles), Calendar, Clock, Cubes & Dices, Selection Decision Table (Decision Making), Logical Sequence Of Words, Crypt Arithmetic, Venn Diagram, Data Arrangement, Inequality, Analogy, Ranking, Order and Sequence, Clerical Aptitude, Verbal Classification
General Awareness: Polity, Evolution of Indian Banking (Banking & Financial Awareness), Physics, Biology, Chemistry, History, Geography, Indian Economy, Static General Knowledge, GK- Current Affairs, NEP 2020, Environment

AI summary & chapters

AI Summary

An AI-generated summary of this video lecture.

This educational video, presented by Yash Jain, is a tutorial on solving mixture and alligation problems. The lecture begins with an introduction to the topic, followed by a detailed explanation of a formula for calculating the quantity of an ingredient to be added to increase concentration. The instructor demonstrates this formula with two worked examples: first, calculating how much milk to add to an 80-litre mixture to increase its concentration from 70% to 95%, and second, determining how much lime juice to add to 4 litres of lemon water to increase its concentration from 15% to 20%. The video uses a digital whiteboard for step-by-step calculations, clearly showing the application of the formula: (Quantity of mixture) x (New concentration - Old concentration) / (100 - New concentration). The video concludes with a 'Thanks for Watching' screen.

Chapters

0:00 – 2:00 00:00-02:00
The video opens with an animated title card for 'MIXTURES & ALLIGATIONS' by Yash Jain, a Knowledge Gate Educator. The instructor, Yash Jain, appears in a small window and introduces the topic. The main screen displays a slide titled 'Adding an Ingredient to Increase Concentration', setting the stage for the lesson. The instructor begins to explain the concept of increasing the concentration of a component in a mixture by adding more of that component.
2:00 – 5:00 02:00-05:00
The instructor presents the first problem: '80 litres of a mixture of milk and water contains 70% milk. How much milk should be added to the mixture so that the percentage of milk becomes 95%?'. He then introduces the formula for the quantity to be added: (Quantity of mixture) x (New concentration - Old concentration) / (100 - New concentration). He writes this formula on the digital whiteboard and substitutes the values from the problem: 80 x (95 - 70) / (100 - 95), which simplifies to 80 x 25 / 5. He calculates the result as 400 litres, explaining that 400 litres of milk must be added.
5:00 – 6:44 05:00-06:44
The instructor moves to the second example: '4 litres of lemon water contains 15% lime juice. How much lime juice should be added to increase the concentration to 20%?'. He applies the same formula: 4 x (20 - 15) / (100 - 20). He writes the calculation as 4 x 5 / 80, which simplifies to 20 / 80, resulting in 0.25 litres. The video concludes with a 'THANKS FOR WATCHING' screen.

The video provides a clear, step-by-step tutorial on solving mixture problems where the goal is to increase the concentration of a component. It establishes a universal formula, (Q x (N - O)) / (100 - N), where Q is the quantity of the mixture, N is the new concentration, and O is the old concentration. The instructor effectively demonstrates the application of this formula with two distinct, real-world examples, reinforcing the method through calculation. The progression from a general concept to specific, worked problems ensures a comprehensive understanding of the topic.