Others Maths Puzzle

Q. It takes 40 men eight days to earn 2000. How many men will earn 200 in two days?

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Others Other Question

Q. 150 men start a piece of work.After very next day 4 men leave the work. It takes 8 more days than the usual time to complete the work. Find the actual time required to do the work?(I also think some data problem in the question) Q. If arithmetic mean of six numbers is 4.5. What is the sum of these numbers