Arnab is twice as fast as Bhanu, and Bhanu is one-third as fast as Chandu. If together they can complete work in 30 days, in how many days can Arnab, Bhanu and Chandu do the work respectively?
1
68, 78, 98
2
90, 180, 60
3
45, 80, 150
4
38, 49, 122
5
None of these