Ramesh and Rahman can do a work in 20 and 25 days respectively. After doing collectively 10 days of work, they leave th…

A can lay railway track between two given stations in 16 days and B can do the same job in 12 days. With help of C, they…

A is 30% more efficient than B. How much time will they, working together, take to complete a job which A alone could ha…

A can do a piece of work in 20 days and B in 40 days. If they work together for 5 days, then the fraction of the work th…

A is thrice as good a workman as B and so takes 60 days less than B for doing a job. The time in which they can do the j…

A can do a work in 10 days. The efficiency of A is 20% less than B. How many days B need to finish the same work?

X and Y can do a piece of work in 20 days and 12 days respectively. X started the work alone and then after 4 days Y joi…

A single reservoir supplies the petrol to the whole city, while the reservoir is fed by a single pipeline filling the re…