12 men can complete one-third of the work in 8 days. In how many days can 16 men complete that work?

George takes $8$ hours to copy a $50$ page manuscript while Sonia can copy the same manuscript in $6$ hours. How many hours would it take them to copy a $100$ page manuscript, if they work together?

A sum of Rs $25$ was paid for a work which A can do in $32$ days, B in $20$ days, B and C together in $12$ days, and D in $24$ days. How much would C receive if all them worked together?