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Time and Work — Revision Notes

XAT · Quantitative Ability & Data Interpretation

Free Time and Work revision notes for XAT Quantitative Ability & Data Interpretation 2026 — key concepts, formulas, and definitions for quick revision.

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A diagram illustrating the fractional approach to time and work problems. It shows how individual work rates (1/a, 1/b) are combined to find the total work rate (1/a + 1/b) and then inverted to find t
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Revision Notes — Time and Work

Key concepts, formulas, and definitions from Time and Work for XAT Quantitative Ability & Data Interpretation preparation.

Key Topics to Revise

1

Basic Concepts and Theory

  • If A completes work in 'a' days, then A's one day work = 1/a of the total work
  • Total work is considered as 1 unit or 100% for calculation purposes
  • Work rate × Time = Work done (fundamental equation)
2

Solution Methods

  • Fraction Method: Uses 1 as total work, calculations involve adding fractions
  • Percentage Method: Uses 100% as total work, easier for mental calculations
  • LCM Method: Most efficient, assumes total work as LCM of individual days
3

Advanced Applications

  • Alternating Work: Workers take turns, solve by considering work cycles
  • Variable Workforce: Workers join or leave during project execution
  • Pipe and Cistern: Involves positive work (filling) and negative work (emptying)
4

Problem-Solving Strategies

  • Identify the type of problem first (basic, alternating, variable, etc.)
  • Choose appropriate method based on given data complexity
  • Set up equations systematically using work rate principles

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Key Concepts

If A can complete workWhen multiple workers work togetherTake the LCM of all givenInstead of fractionsIn problems involving destruction or emptying

Frequently Asked Questions

What topics are covered in Time and Work for XAT?
Time and Work is an important chapter in XAT Quantitative Ability & Data Interpretation. It covers key concepts and formulas that are frequently tested in the exam. Key topics include: Basic Concepts and Theory, Solution Methods, Advanced Applications, Problem-Solving Strategies.
How important is Time and Work for XAT?
Time and Work is a frequently tested chapter in XAT Quantitative Ability & Data Interpretation. Questions from this chapter appear regularly in previous year papers. There are 55 practice questions available for this chapter.
How to prepare Time and Work for XAT?
Start by understanding the core concepts, then solve practice questions. Focus on formulas and their applications. Use revision notes for quick review before the exam.

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