A constructor estimates that 3 people can paint mr khan's house in 4 days. If he uses 4 people instead of 3, how long will they take to complete the job?
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Given, 3 people requires 4 days.
As the people are increased to 4, i.e. 3 ×(4/3) =4, so work will be reduced to (3/4) ×4=3 days.
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