Mathematics, 21.11.2020 19:10, daniellcharmaine

Joe and Renee are building a fence. Joe can build the fence alone in 4 hours. If Renee starts helping Joe after he has already worked on the fence for 2 hours, they will finish the fence 90 minutes after she joins him. How long would it take Renee to build the fence alone? Pls help
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Joe and Renee are building a fence. Joe can build the fence alone in 4 hours. If Renee starts helpin...