Question : After working for 20 days, Shikha finds that only 20 percent of the work is done. She employs Tina who is 100 percent more efficient than Shikha. In how many days Tina alone can complete the whole work?

Question : Rimmi and Simmi can together finish a work in 40 days. They worked together for 30 days and then Simmi left. After another 30 days, Rimmi finished the remaining work alone. In how many days Rimmi alone can finish the work?

Question : Dev completed the school project alone in 40 days. How many days will Arun alone take to complete the same work if he is 25% more efficient than Dev?

Question : A can do a piece of work alone in 40 days. A and B together can do the same work in 10 days. C is 50% less efficient than B. In how many days can A and C together complete the same work?

Question : A alone can complete a work in 25 days and B alone can complete the same work in 50 days. If both of them work together, then in 9 days what percentage work of the total work will be completed?