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# Time and Work-Basic test 1

11)

6 boys can complete a piece of workin 16 hours. In how many hours will 8 boys complete the same work?

[Bank Clerks 2011]

12)

If P, Q, R can do a piece of work in 4 days, 8 days and 12 days respectively. If all of them work together, how long will they take to complete the work?

13)

Neena and Meena together can complete a job in  12 days and Neena alone can complete the same job in 18 days. In how many days can Meena alone complete the job?

14)

12 men can do a piece of work in 24 days, how many days are needed to complete the work if only 8 men do this work?

[IDBI officers 2010]

15)

20 men can cut some trees in 4 hours. If 4 men leave the job, how many trees will be cut in 12 hours?

[UP (police) 2007]