A contractor estimates that 3 persons could rewire Jasminders house in 4 days. If he uses 4 persons instead of three, how long should they take to complete the job?

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

So if he hires 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.

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