Math Olympiad Contest Problems for Elementary and Middle Schools # 140 @MrMathExpert
Math Olympiad Contest Problems for Elementary and Middle Schools # 140 @MrMathExpert
Uploaded May 2024 | Updated September 2026, 1 week ago
Alice needs 1 hour to do a certain job. Betty, her older sister, can do the same job in ½ hour. How many minutes will it take them to do the job if they work together at the given rates?

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Math Olympiad Contest Problems for Elementary and Middle Schools # 140

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