4 men and 3 women finish a job in 6 days, and 5 men and 7 women can do the same job in 4 days. How long will 1 man and 1 woman take to do the work?

4 men and 3 women finish a job in 6 days, and 5 men and 7 women can do the same job in 4 days. How long will 1 man and 1 woman take to do the work?

• A. 22 [2/7] days
• B. 25 [1/2] days 
• C. 5 [1/7] days
• D. 12 [7/22] days

 

The correct answer is option A. 22 [2/7] days. Can you explain this answer in the comments?

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