## Ismaiel Kalady is teaching live on Unacademy Plus

TIME & WORK LCM - Efficiency Shortcut Tricks 6 20 QUESTIONS unacademy

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

16. A does 4/5 of a piece of work in 20 days; then he calls B and they finish the remaining work in 3 days. How long B alone will take to do whole work?

16. A does 4/5 of a piece of work in 20 days; then he calls B and they finish the remaining work in 3 days. How long B alone will take to do whole work? 4/5 Work done in 20 days, Full work is done by A in 25 days

16. A does 4/5 of a piece of work in 20 days; then he calls B and they finish the remaining work in 3 days. How long B alone will take to do whole work? 4/5 Work done in 20 days, Full work is done by A in 25 days 1/5 of Work done by (A+B) in 3 days, Full work by (A+B) 15 days LCM 75, Efficiency of A 3, Efficiency of (A+B) 5

16. A does 4/5 of a piece of work in 20 days; then he calls B and they finish the remaining work in 3 days. How long B alone will take to do whole work? 4/5 Work done in 20 days, Full work is done by A in 25 days 1/5 of Work done by (A+B) in 3 days, Full work by (A+B) 15 days LCM 75, Efficiency of A 3, Efficiency of (A+B) 5 Efficiency of B 5-3 2 Days needed by B- 75/2 - 371 days

17. A can finish a piece of work in 18 days and B can do the same work in 15 days, B worked for 10 days and left the job. In how many days, A alone can finish the remaining work?

17. A can finish a piece of work in 18 days and B can do the same work in 15 days, B worked for 10 days and left the job. In how many days, A alone can finish the remaining work? A 18 90 ( LCM) B 156

17. A can finish a piece of work in 18 days and B can do the same work in 15 days, B worked for 10 days and left the job. In how many days, A alone can finish the remaining work? A 7 18 90 ( LCM) B156 work done by B in 10 days-10 Remaining Work 90-60 30 6 60

17. A can finish a piece of work in 18 days and B can do the same work in 15 days, B worked for 10 days and left the job. In how many days, A alone can finish the remaining work? A -18 90 ( LCM) 6 Work done by B in 10 days 10 x 6 60 Remaining Work - 90- 60-30 30 Days needed by A to do the remaining work 6 days 5

18. A and B can complete a piece of work in 15 days and 10 days respectively. They contracted to complete the work for Rs.30,000. The share of A in the contracted money will be: A15 30 (LCM) B 10 3

18. A and B can complete a piece of work in 15 days and 10 days respectively. They contracted to complete the work for Rs.30,000. The share of A in the contracted money will be: A15 30 ( LCM) B 10 3 Ratio of Efficiency 2:3 Total amount 5 units 30,000 So, Share of A 2 units 12,000