Subject: mathqa
Question: 8 men can do a piece of work in 12 days . 4 women can do it in 48 days and 10 children can do it in 24 days . in how many days can 6 men , 4 women and 10 children together complete the piece of work ?
Option: 
A: 7 days
B: 15 days
C: 28 days
D: 8 days
Answer: D