Question

5 men and 12 boys finish a piece of work in 4 days, 7 men and 6 boys do it in 5

days. The ratio between the efficiencies of a man and boy is?

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Answer 1

Answer:

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Answer 2

Answer:

5 men  and  12 boys = 4 days

7 men and 6 boys = 5 days

14 mens and 18 boys = 9 days

Ratio between man and boys is

                    7:9

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