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3 years ago

8

Mark can clean his father's office in 30 minutes. His younger sister Lynn can clean the office in 40 minutes. How long will it t

ake if they come together and clean the office

2 answers:

zhannawk [14.2K]3 years ago

7 0

If they each do half, it will take 35 minutes.

Elan Coil [88]3 years ago

4 0

10 minutes is the answer

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