SOLUTION: There are 630 dishes that need to be rinsed. Ali can rinse them in 70 minutes by himself. It will take his friend Sam 105 minutes to rinse these dishes. How long will it take them
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-> SOLUTION: There are 630 dishes that need to be rinsed. Ali can rinse them in 70 minutes by himself. It will take his friend Sam 105 minutes to rinse these dishes. How long will it take them
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Question 1136313: There are 630 dishes that need to be rinsed. Ali can rinse them in 70 minutes by himself. It will take his friend Sam 105 minutes to rinse these dishes. How long will it take them if they rinse these 630 dishes together?
Ali rinses = 9 dishes in one minute (in each minute).
His friend rinses = 6 dishes in one minute (in each minute).
Working together, they rinse 9 + 6 = 15 dishes per minute.
Hence, they will complete the job in = 42 minutes, working together.
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