Important Question & Short Trick on Train Problems (1)

Duration: 9 min

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Inside: a video lesson and guided study material.

Module outline

  1. About the Course: About the Course
  2. Paper-1 & 2 | Basic Numeracy: Ratio and Proportion (Ratios), Divisibility Rules, Mixture and Alligation, Permutation and Combination, Logarithm, Number System, HCF LCM, Sequence and Series (Series), Speed Time and Distance, Percentage, Average, Mensuration and Geometry, Age Problems, Arithmetic, Statistics, Probability, Profit and Loss, Simple Interest and Compound Interest, Partnership, Speed Mathematics and Basic Mathematics, Algebra, Powers and Exponents (Surds and Indices), Time and Work, Pipe and Cistern, RSSB Specific Videos - Basic Numeracy
  3. Paper-1 & 2 | Data Interpretation: Data Interpretation
  4. Paper-1 & 2 | General Mental Ability: Mental Ability, RSSB Specific Videos - Mental Ability
  5. Paper-1 & 2 | Logical Reasoning and Analytical Ability: Series (Number and Letter Series) (Numerical Relations and Reasoning), Coding Decoding, Data Sufficiency, Non Verbal Reasoning (Spatial Aptitude) (Spatial Reasoning) (Visual Reasoning), Syllogisms, Seating Arrangements, Blood Relations, Directions (Direction Test), Analytical Reasoning (Counting Figures Reasoning), Puzzle Solving (Puzzles), Calendar, Clock, Cubes & Dices, Venn Diagram, Analogy, Ranking, Order and Sequence, Deductive and Inductive Reasoning (Logical Deduction and Induction) (Prepositional Reasoning), Data Arrangement, Logical Sequence Of Words, Crypt Arithmetic
  6. Paper-1 & 2 | Decision Making and Problem Solving: Selection Decision Table (Decision Making)
  7. Paper-1 | General Science: Physics, Biology, Chemistry, RSSB Specific Videos
  8. Paper-1 | General Awareness: State Wise GK, GK- Current Affairs
  9. Paper - 2 | Digital Logic Systems: Digital Systems & Boolean Basics, Logic Gates & Hardware, Combinational Circuit, Sequential Circuits
  10. Paper-2 | Database Management System: Basics of DBMS, ER Diagram, Relational Model & Functional Dependencies, Keys & Integrity Constraints, Normalization (1NF - BCNF), Decomposition Properties & 4NF, Relational Calculus, Relational Algebra, SQL, NoSQL
  11. Paper-2 | Data Structures & Algorithms: Introduction to DS, Array, Stack, Queue, Linked List, Tree, Graphs, Algorithm Analysis, Sorting Algorithms, Intro to Compilers, Hashing
  12. Paper 2 | Data Communication and Network Security: Introduction to CN, Data Communication, Data Link Layer - Ethernet, DLL: Error Control, Net Layer: IPv4 & Proto, Net Layer: IP Addressing, Application Layer, Hardware basics, Network Security, Ethical Hacking
  13. Paper-2 | Operating Systems: Introduction to OS, Process Management, Memory Management, File Management, Deadlock
  14. Paper-2 | Computer Organization and Architecture: Basics of COA, Floating Point Rep, Cache Memory Organization, Input Output Organisation, Instr Formats & Modes, Control Unit Design, Register Transfer and Microoperations, Programming the Basic Computer, Number System, Number Representation
  15. Paper 2 | System Analysis and Design: Fundamentals of Systems and Information Systems, Fundamentals of Software Engineering, SDLC and Development Approaches, Software Documentation and Software Requirements Specification (SRS), SDD and Quality Assurance, Security, Risk Management & Maintenance, Software Testing
  16. Paper-2 | C Programming: C Fundamentals, Control Flow, Functions, Arrays & Pointers, Storage Classes, Structures & Enums, DMA, Macros, Scoping & File Handling
  17. Paper 2 | OOPS , C++ , JAVA: Language Design, OOPS with C++, Java, .Net Programming, Java Fundamentals
  18. Paper 2 | Python: Introduction to Python, Tokens, Variables, Data Types, I/O, Operators & Expressions, Control Flow & Looping, Collections & Strings, Functions & Modules, File Handling & Data Analysis
  19. Emerging Trends and AI: Emerging Tech Trends, Artificial Intelligence
  20. Paper-2 | Data Processing (Ms-Office): MS Office Applications
  21. Paper-2 | Internet and Web Technologies: HTML Basics, CSS, XML, JavaScript-Basics, Internet Fundamentals, Protocols & Services, Web Publishing & Hosting, Server Side & Security, Emerging Technologies, Terms & Abbreviations, Cyber Threats and Malware Attacks, Role of Internet and Web Services, Security in Mobile and Wireless Computing
  22. Paper 2 | Pedagogy: Child Development, Theories, Concept of Pedagogy, Inclusive Education, Experiential Pedagogy, Assessment & Evaluation, Psychology, Curriculum Framework & Reforms, National Education Policy (NEP) 2020
  23. Live Classes: RSSB Live Sessions
  24. Paper 1 - Full Mock Tests:
  25. Paper 2 - Full Mock Tests:
  26. BCI Previous Year Papers:
AI summary & chapters

AI Summary

An AI-generated summary of this video lecture.

This educational video, presented by Yash Jain Sir of Knowledge Gate Eduventures, is a tutorial on solving "Problems on Trains." The lecture focuses on a specific numerical problem involving the Goa Express train. The instructor guides students through a step-by-step solution to find the length of a platform given the train's length and the time taken to cross both a stationary man and the platform itself. The lesson emphasizes the relationship between speed, distance, and time, demonstrating how to set up algebraic equations based on physical scenarios. The video includes introductory graphics and a copyright notice at the bottom of the slides, ensuring students understand the context of the problem.

Chapters

  1. 0:00 – 2:00 00:00-02:00

    The video begins with an animated title card reading "PROBLEM ON TRAINS" featuring a sketch of a steam locomotive. It then transitions to a slide displaying the specific problem statement in black text: "Que: Goa Express (280 meters long), travelling at uniform speed, crosses a platform of Londa Junction in 60 seconds, and passes a man standing on the platform in 20 seconds. What is the length of the platform in meters?" The instructor appears in a small window in the bottom left corner, introducing the problem. The slide also features a background image of the Londa Junction station sign in yellow with text in Kannada and English. A copyright notice for "KNOWLEDGE GATE EDUVENTURES" is visible at the bottom, warning against piracy.

  2. 2:00 – 5:00 02:00-05:00

    The instructor begins the solution process by writing the fundamental formula S = d/t in red ink on the yellow background. He categorizes the problem into two distinct parts labeled "Platform" and "Man" in red. He first addresses the "Man" scenario on the right side, writing the equation S = 280/20 and calculating the speed as 14. He then sets up the equation for the "Platform" scenario on the left side, writing S = (280 + l) / 60, where l represents the unknown length of the platform. He equates the two speed values to form a single equation: 14 = (280 + l) / 60. He boxes the equation for emphasis to show the relationship between the two scenarios.

  3. 5:00 – 8:57 05:00-08:57

    The instructor proceeds to solve the algebraic equation derived in the previous step. He multiplies 14 by 60 to get 840, writing 840 = 280 + l. He then isolates the variable l by subtracting 280 from 840, resulting in the final answer l = 560 meters. To reinforce the concept, he draws simple diagrams using red lines, showing a rectangle representing the train and another representing the platform to visualize the total distance covered. He uses arrows to indicate the direction of movement. He concludes the problem by confirming the length of the platform is 560 meters.

The video provides a clear, methodical approach to solving train problems by breaking them down into manageable components. The instructor effectively uses the formula S = d/t as the foundation for the solution. By first calculating the speed using the simpler scenario (passing a man), he establishes a constant value to use in the more complex scenario (crossing a platform). The visual aids, including the handwritten equations and the diagrams of the train and platform, help students visualize the distance covered in each case. The distinction between passing a point (distance = train length) and crossing an object (distance = train length + object length) is the core concept demonstrated. The instructor's use of color coding (red for equations) helps distinguish the mathematical steps from the problem statement. The final calculation confirms the platform length is 560 meters, providing a complete solution to the initial query. This structured method ensures students can apply the same logic to similar problems involving relative speed and distance.

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