Time and Work Questions

Ehsaan is twice as good a worker as Kamal and together they finish a piece of work in 29 days. In how many days will Kamal, working alone, finish the work?

Akash is 3 times as good a workman as Baldev and therefore is able to finish a job in 40 days less than Baldev. Working together, they can finish it in _____.

A piece of work was finished by A, B and C together. A and B together finished 60% of the work and B and C together finished 70% of the work. Who among the three is most efficient?

A can do a work in 21 days and B in 42 days. If they work on it together for 7 days, then what fraction of work is left?

A carpenter can build a cupboard in 48 hours. After 12 hours he takes a break. What fraction of the cupboard is yet to be built?

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?

A can finish a work in 7 days . B can finish the same work in 9 days . The days required to finish the work by both of them together.

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?