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Answer:
1. 30 minutes because 50% is ½, and ½ of 60 minutes is 30 minutes.
2. 6 minutes because 10 is ⅒, and ⅒ of 60 minutes is 6 minutes.
3. 45minutes because 75% is ¾, and ¾ of 60 minutes is 45 minutes.
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