A is 40% more efficient than B. How much time will both, working together, take to finish the work, which B alone can finish in 36 days?

A, B and C alone can complete a piece of work in 24, 36 and 18 days respectively. A started working, after 2 days C joins with them and B joins with them after another 2 days, then find the no of days A, B and C worked together.

X can complete a piece of work in thrice the time taken to complete Y and Z together. If X and Y together can complete the work in $${9{3\over 5}\ }$$days and Z alone complete in 16 days, then find the no of days taken to complete the work by X alone?

A can do 50% of a work in 16 days, B can do 1/4 of the same work in 24 days. In how many days will they complete 3/4th of the work working together?

42 boys can complete a piece of work in 20 days working 8 hours per day. In how many days can 14 boys complete the same work, each boy working 12 hours per day?

A certain number of men can do a work in 60 days. If there were eight more men, it could be completed in 10 days less. How many men were there in the beginning?

A person covered some distance at some speed. If he traveled a distance of 3 km / h more, it took him 40 minutes less time. If he had covered the distance at a speed of 2 km / h less, he would have taken 40 minutes more. The distance (in km) is

If Anju is 30% more efficient than Bitt, then how much time will they take, working together, to complete a job which Anju alone could have done in 23 days?