If 15 men or 24 women or 36 boys can complete a piece of work in 12 days by working 8 hours a day, then how many men must be required to work with 12 women and 6 boys to complete another piece of work
1
2
4
times the previous piece of work in 30 days by working 6 hours a day?
Option
(a) 6
(b) 4
(c) 8
(d) 10