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There are 600 dishes that need to be rinsed. Tony can rinse them in 120 minutes by himself. It will take his friend Ravi 60 minutes to rinse these dishes. How long will it take …

There are 600 dishes that need to be rinsed. Tony can rinse them in 120 minutes by himself. It will take his friend Ravi 60 minutes to rinse these dishes. How long will it take …
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5 votes
There are 600 dishes that need to be rinsed. Tony can rinse them in 120 minutes by himself. It will take his friend Ravi 60 minutes to rinse these dishes. How long will it take them if they rinse these 600 dishes together

asked
User Yun Tae Hwang
by
8.1k points

1 Answer

2 votes

Explanation:

1 / (1/120 + 1/60) = 40 minutes.

answered
User Rahul P
by
9.0k points
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