29-05-2018
Mathematics

contestada

there are 720 dishes that need to be rinsed. Scott can rinse them in 72 minutes by himself. It will take his friend D 90 minutes to rinse these dishes . How long will it take them if they rinse these 720 dishes together

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rajansg01p9gp45 rajansg01p9gp45

29-05-2018

10plates/min scott
8plates/min D
18plates/min together

720/18= 40min

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