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Three workers can do a job in 12 days. Two of the workers work twice as fast as the third. How long would it take one of the faster workers to do the job alone?

A. 30

B. 35

C. 40

D. 42

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সঠিক উত্তরঃ A. 30

Explanation:

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Three workers can do a job in 12 days. Two of the workers work twice as fast as the third. How long would it take one of the faster workers to do the job alone?