If 10 men can finish a job in (x+5) days and 12 women can accomplish the same task in (2x+6) days, given that the efficiency ratio between a man and a woman is 2:1, how long would it take for 5 men and 5 women working together to complete the same job?
1
12 days
2
16 days
3
20 days
4
18 days
5
None of these