Passage

Directions: Read the following to answer the question. Priya, Jyoti, Pooja, Kajol, Neha and Khushi alone need a unique time to do a job. Priya can complete the job in 10 days, Jyoti alone takes 20 days less than the time taken by Pooja alone to complete the same job and Pooja alone takes 30 days more than the time taken by Priya alone. If Neha, Khushi and Kajol work together, then the total job can be completed in days, if Khushi is 50% more efficient than Neha and Kajol is 100% more efficient than Khushi.

The time taken by Jyoti and Khushi together to complete the same job is how many days more than the time taken by Priya and Kajol together to complete the same job?