Question 476736
3 workers take 10 days to make a boat. How long would 5 workers take.
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Assuming all workers have the same individual work rates=1/x
The work rate of  3 workers working together=1/10
1/x+1/x+1/x=1/10
3/x=1/10
x=30
individual work rate =1/30, that is, each worker would take 30 days to complete the job working alone.
With 5 workers working together:
1/30+1/30+1/30+1/30+1/30=1/x
5/30=1/x
5x=30
x=6 
ans:
It would 5 workers 6 days to make a boat.