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Troyanec [42]
2 years ago
7

Working alone, Jack can do a puzzle in 5 hours. With his brother's help, the two can do the same puzzle in 2 hours. How long wou

ld it take Jack's brother to do the puzzle alone?
Mathematics
1 answer:
Elza [17]2 years ago
7 0

Answer:

3 hours, and 20 minutes.

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