A work can be finished in 16 days by twenty women. The same work can be finished in fifteen days by sixteen men. The ratio between the capacity of a man and a woman is_________?
Correct answer: B. 4:3
- A. 1:3
- B. 4:3
- C. 2:3
- D. 2:1
Explanation
The work equals 20 women x 16 days = 320 woman-days and also 16 men x 15 days = 240 man-days. Thus a man's capacity compared with a woman's is 1/240 : 1/320 = 320:240 = 4:3. The likely mistake is 2:3, which does not use the equal-work relationship correctly.
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