Passage

Directions: Study the given information and answer the following question. A firm allots one project to four persons, namely Reema, Suresh, Ramya and Sneha, and they need a certain time to complete the project. Reema alone can complete the whole work in 60 days, while Suresh needs 180 days to complete the whole work alone.

At first, Ramya and Sneha start working together, and together they work for 24 days. After that, they are replaced by Reema and Suresh. The remaining work is completed successfully by Reema and Suresh together in 20 days. The ratio of efficiency of Ramya to that of Sneha is 3 : 5. Find the difference between the times that would be taken by Ramya and Sneha to complete the whole project, working alone.