Time and Work Questions

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 as much work in 4 days as B can do in 5, and B can do as much work in 6 days as C in 7. In what time will C do a piece of work which A can do in a week ?

Anil is twice as good as workman as Bimal and together they finish a piece of work in 9 days. In how many days will Anil alone finish the work?

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?

X, Y and Z can do a piece of work in 30,40 and 50 days respectively. All three of them began the work together but Y left 4 days before completion of the work. In how many days was the work completed?

A can do a work in 20 days and B in 50 days. If they work on it together for 5 days, then what fraction of work is left?

If 10 people can do a job in 20 days,then 20 people with twice the efficiency can do the same job in

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?