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I spend 25 hours to clean my garden. How long it will take if 4 people (with the same efficiency) come join to me?

I spend 25 hours to clean my garden. How long it will take if 4 people (with the same efficiency) come join to me?

Explanation

To find the new time required to complete the task, divide the original time by the number of workers:

25 hours ÷ 5 workers = 5 hours

So, if 4 people with the same efficiency join you, it will take 5 hours to clean the garden.