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解析库 > 2023年09月GRE机经

Machines A, B, and C produce widgets at their respective constant rates. Machine A produces

$n$ widgets in

$x$ hours, machine B produces

$n$ widgets in

$2x$ hours, and machine C produces

$n$ widgets in

$3x$ hours. In terms of

$x$ , how many hours does it take the three machines, working simultaneously at their respective constant rates to produce

$n$ widgets?

题目来源

题目来源1 : 2023年09月GRE机经

题目来源2 : 2024年4月GRE机经

题目来源3 : 2024年8月GRE命中机经

题目来源4 : 2024年12月GRE命中机经

题目来源5 : 2025年2月GRE机经

题目来源6 : 2025年3月GRE机经

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Machines A, B, and C produce widgets at their respective constant rates. Machine A produces

$n$ widgets in

$x$ hours, machine B produces

$n$ widgets in

$2x$ hours, and machine C produces

$n$ widgets in

$3x$ hours. In terms of

$x$ , how many hours does it take the three machines, working simultaneously at their respective constant rates to produce

$n$ widgets?

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