Mathematics, 17.08.2020 04:01 charlesmb7985

It takes Zina 1 hours to build a model skyscraper and Rachel 3 hours to do the same job. It will take hours to build a model skyscraper working
together?

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It takes Zina 1 hours to build a model skyscraper and Rachel 3 hours to do the same job. It will ta...