A and B can do a piece of work in 12 days. B and C can do it in 15 days while C and A can do it in 20 days. In how long will they complete it cooperating?
1
25
2
10
3
30
4
20
5
26
A and B can do a piece of work in 12 days. B and C can do it in 15 days while C and A can do it in 20 days. In how long will they complete it cooperating?