kjhad6697 kjhad6697

21-02-2024
Mathematics

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There are 810 dishes that need to be rinsed. Scott can rinse them in 90 minutes by himself. It will take his friend Sam 135 minutes to rinse these dishes. How long will it take them if they rinse these 810 dishes together?
a) 54 minutes
b) 100 minutes
c) 72 minutes
d) 150 minutes

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