Time and Work

Manju takes 16 days to complete a piece of work. If she works with her friend Jenny, they complete it in 12 days. How many days will it take for Jenny to complete the work alone?

P and Q can complete a piece of work in 15 days and 10 days, respectively. They are awarded a contract to complete the work for Rs. 30,000. The share of P in the money paid will be

Veer can complete a piece of work in 20 days. The same work can be completed by Ram in 18 days. If they work together for 5 days, then what fraction of the work will be left after 5 days?

Ruhana is thrice as good a painter as Reshma and together they finish a painting in 18 days. How many days will Ruhana alone take to complete the painting?

Two persons P and Q can complete a piece of work individually in 10 days and 15 days respectively. If P works for 2 days and Q works for 5 days, find the part of work done.

Two workers, 'A' and 'B', working together, completed a job in 5 days. Had 'A' worked twice as efficiently as he actually did and 'B' worked one-third as efficiently as he actually did, the work would have been completed in 3 days. In how many days could 'A' alone have completed the job?

A group of 5 people can do a certain work in a certain number of days. If 3 more people join the group, it takes 12 days less to do the same work. In how many days can a group of 3 people complete this work?

X, Y and Z can do a piece of work in 30 days, 45 days and 90 days, respectively. In how many days can the work be completed if X is assisted by Y and Z together, on every second day?

7 men and 3 women complete a work together in 10 days. 8 men and 2 women complete the same work in 8 days. How much work can be done by 12 men in one day?

Aditya can finish a piece of work in 21 days and Sam can do the same work in 24 days. They start the work together; but after some time, Aditya leaves the work and Sam finishes it in 9 days. Find out after how many days Aditya leaves the work.

Five women can do a work in 36 days. If the ratio of the capacity of a man to that of a woman is 3 : 1, then how many days will it take for 5 men to complete the same work?

Adil and Biren together can complete a task in 20 days. Biren and Chirag together can complete the same task in 50 days. Adil and Chirag together can complete the same task in 40 days. If the same task was to be done by them alone, what would be the ratio of time taken by Adil alone to that taken by Biren?