Quantitative Aptitude – Time & Work (Easy Concepts, Formulas & Tricks)
Time and Work deals with how much work is done in a given time. It is based on efficiency and speed of work.
Basic Idea
Work = Time × Efficiency
More efficiency → less time
Less efficiency → more time
Important Formula
- If A can do a work in 10 days → A’s 1 day work = 1/10
- Total work = LCM of days
Easy Example
Question:
A can complete a work in 10 days.
How much work does he do in 1 day?
Answer: 1/10 ✔
Two Person Work
Example:
A = 10 days → 1/10
B = 5 days → 1/5
A + B = 1/10 + 1/5 = 3/10
Time = 10/3 days ✔
LCM Method
If A = 10 days, B = 15 days
LCM = 30
A = 3 units/day
B = 2 units/day
Total = 5 units/day
Time = 30/5 = 6 days ✔
Practice Questions
Q1: A can do work in 5 days → 1 day work?
Q2: A = 10 days, B = 10 days → together?
Q3: A = 6 days, B = 3 days → together?
Answers
Q1: 1/5
Q2: 5 days
Q3: 2 days
Quick Tricks
- Convert days → efficiency
- Use LCM method for speed
- Do not calculate directly
Final Tip
Time and Work becomes easy with practice. Focus on efficiency concept and solve quickly.
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