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Time & Work - Part 3 (in Malayalam)
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Lesson 3 discusses the different types of time & work problems. 3 questions are discussed and solved in this lesson. LCM & Efficiency method of solving the time and work problem is discussed. The concept of efficiency - lcm method is explained in detail. Questions including 3 persons and related questions are solved

U
shukria ji
AS
3 men and 4 women can together complete a work in 5 days which 5 women and 6 boys can together complete in 4 days . how many boys are required to replace 30 men for completing a job, sir please give answer to this question
good class. thank u sir
Sir font colour is dim. Good classes. Helpful
Excellent short-cut methods
1. TIME & WORK LCM - Efficiency Shortcut Tricks 20 QUESTIONS unacademy

2. Course Overview Basics of Time & Work Problems LCM (Efficiency) Method . In-depth Analysis of Efficiency method through Questions Advanced Tricks to Solve Quickly . Different Types of Time & Work Problems .Previous Year PSC Questions

3. 7. A can do a piece of work in 20 days and B in 40 days. If they work together for 5 days, then the fraction of the work that is left:

4. 7. A can do a piece of work in 20 days and B in 40 days. If they work together for 5 days, then the fraction of the work that is left: A - 20 2 40 ( LCM) B 401

5. 7. A can do a piece of work in 20 days and B in 40 days. If they work together for 5 days, then the fraction of the work that is left: A - 20 2 40 ( LCM) Total Efficiency of A + B 2+1 3 units Work finished in 5 days 5 x 3 15

6. 7. A can do a piece of work in 20 days and B in 40 days. If they work together for 5 days, then the fraction of the work that is left: A 20 40 (LCM) B 401 Total Efficiency of A+B-2 Work finished in 5 days 5 x 3-15 Work left 40 15 25 Fraction of work left-25-5 +1 3 units 40 8

7. 8. A & B can do a work in 72 days, B and C can do it in 120 days, C and A do it in 90 days. If A, B and C work together, they will complete the work in:

8. 8. A & B can do a work in 72 days, B and C can do it in 120 days, C and A do it in 90 days. If A, B and C work together, they will complete the work in: A+B72 5 B+C-) 1203 C+A904 360 ( LCM)

9. 8. A & B can do a work in 72 days, B and C can do it in 120 days, C and A do it in 90 days. If A, B and C work together, they will complete the work in: A+B72 5 B+C-) 1203 C+A904 360 ( LCM) Total Efficiency A+B+B+C+C+A 2(A+B+C) 5+3+4 12

10. 8. A & B can do a work in 72 days, B and C can do it in 120 days, C and A do it in 90 days. If A, B and C work together, they will complete the work in: A+B - 72 5 C+A90 Total Efficiency A+B+B+C+C+A 2(A+B+C) 5+3+4 12 Efficiency of (A+B+C) 6 Days needed by (A+B+C) 3660 days 360 ( LCM) 4

11. 9. If A, B and C together can finish a piece of work in 4 days, A alone in 12 days and B in 18 days, then Calone can do it in A 12 18 36 (LCM)

12. 9. If A, B and C together can finish a piece of work in 4 days, A alone in 12 days and B in 18 days, then Calone can do it in A > 12 36 (LCM) B - 18 27 Efficiency of C (A+B+C) (A+B) 9 (3+2) 4 Days needed by C-9 days 36