G and J together can complete a piece of work in 8 days, J and K together can complete same piece of work in 12 days while G and K together can complete the work in 20 days. In how many days will the work be completed if all individuals – G, J and K work together?
1
240/31 days
2
120/17 days
3
480/37 days
4
240/13 days