A and B together can complete a piece of work in 25 days, B and C together can complete the same piece of work in 36 days, while C and A together can complete it in 30 days. If A, B, C, and D together can complete this piece of work in 18 days, then in how many days can D alone complete this piece of work?

A can lay railway track between two given stations in 20 days and B can do the same job in 12 days. With the help of C, they did the job in 2 days only. Then, C alone can do the job in​

Isha can do a certain piece of work in 24 days. Isha and Smriti can together do the same work in 20 days, and Isha, Smriti and Ashlesha can do the same work together in 12 days. In how many days can Isha and Ashlesha do the same work together?​

Priya can do a certain piece of work in 30 days. Priya and Varsha can together do the same work in 18 days, and Priya, Varsha and Nisha can do the same work together in 9 days. In how many days can Priya and Nisha do the same work?

Aryan takes 12 hours to mow a large lawn. He and Arman together can mow it in 7 hours. How long will Arman take to mow the lawn if he works alone?

Jaya can do a certain piece of work in 30 days. Jaya and Sushma can together do the same work in 21 days, and Jaya, Sushma and Hina can do the same work together in 14 days. In how many days can Jaya and Hina do the same work together?

Ravi can complete one-fourth of the total work in 15 days, Chavi can complete one-third of the total work in 18 days, Dhani can complete half of the total work in 24 days. In how much time can Ravi, Chavi and Dhani complete three-fourth of the work together?

A and B together can do a work in 2T days and A alone can do the same work in 10 days. If B alone can do the work in 5T days, then find the value of T?