1.A and B together can do a job in 4 days.If A can do job in 12 days if he works alone ,then how many days B alone take to complete the job?
ANS:6Days.
2.A and B can do job in 8 days. B and C can do same job in 12 days.A,B and C together can do same job in 6 days.In how many days A and C together can complete the job?
ANS:8Days.
3.A is twice as efficient as B and can complete a job in 30 days before B.In how much they can complete the job together?
ANS:20Days Crore.