Question

400 workers can complete a job in 75 days. How many days will it take to complete that work to replace 25 workers from that?​

Answer 1

Answer:

I’ll assume that all workers work at the same rate, and that new workers don’t need any training, and will be as productive as current workers (in other words, this is strictly a mathematical solution, and will not necessarily apply in a real world application).

12 work=200 workers×75 days=15000 worker-days

Half the work still needs to be done, so this will require a further 15000 worker-days . Since only 25 days remain, number of workers required is

15000 worker-days25 days=600 workers

400 more workers are required to complete the project on time