Question

It takes 45 days for 20 workers to complete a job. how many days will it take if 30 workers do the same job

Answer 1

20 workers takes 45 days to complete a job

1 worker takes (45×20)=900days to complete a job

30 workers takes (900/30)=30 days to complete a same job.

Therefore it takes 30 days to complete same job for 30 workers