Question

A contractor estimates that 3 persons would require to paint a house in 4 days. If he uses 4 persons instead of three, how Long should they take to complete the job?

Answer 1

That means they will complete the job in 3 days. If you increase manpower, you reduce on the time that will be spent to complete a task.

Answer 2

According to the data mention in the question;

A contractor estimates that 3 persons would require to paint a house in 4 days.

So if he hire 4 persons ,the required time will be;

3 persons complete in = 4 days

1 person completes in = 4×3days

4 person will complete in= (4×3)/4 days=3 days

So,the required time will be 3 days, if the contractor hire 4 persons.