Aditya can complete a work in 10 days if he works for 9 hours a day while Sabir can complete the same work in 9 days if he works for 15 hours a day. What is the total time taken to complete 3/5 of the total work if they work together for 8 hours a day.
1
75/20 days
2
77/20 days
3
79/20 days
4
81/20 days
5
83/20 days