Three workers Shubham, Ravi and Abhishek were assigned to a project. Time taken by Shubham is thrice the time taken by Abhishek to do the task when working alone. Ravi is 40% more efficient than Shubham, working together Ravi and Abhishek can finish the project in 105/22 days. Calculate the time taken by them to finish the project working together.
1
35/8
2
36/5
3
45/8
4
35/9
5
105/29