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Mathematics, 07.09.2020 19:01 Svetakotok

David can clear a lot in 1.5 hours. His partner can do the same job in 8.5 hours. How long will it take them to clear the lot working together?

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David can clear a lot in 1.5 hours. His partner can do the same job in 8.5 hours. How long will it t...

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