Time and Work Questions

Amar is 2 times as good a workman as Badal and therefore is able to finish a job in 15 days less than Badal. In how many days can they together complete the job?

P and Q can do a project in 60 and 30 days respectively. In how many days can they complete 90% of the project if they work together?

Sashi can do a piece of work in 20 days. Tanya is 25% more efficient than Sashi. The number of days taken by Tanya to do the same piece of work is:

A,B and C contract a work for Rs. 440. Together A and B are to do 9/11 of the work. The share of C should be:

Mahanath works 2 times as fast as Sahay. If Sahay can complete a job alone in 21 days, then in how many days can they together finish the job?

Sumit is 28% less efficient than Amit. If Amit can make a wall in 54 days, then Sumit can complete the same work in how many days?

A can do a work in 36 days and B in 12 days. If they work on it together for 3 days, then what fraction of work is left?

Manoj can do a piece of work in 42 hours. If he is joined by Jayashree who is 100% more efficient, in what time they will finish the work together?