Question

4 boys from school A and 6 boys from school B together can set up an exhibition in 5 days, which 5 boys from school A and 10 boys from school C together can do in 4 days or 3 boys from school B and 4 boys from school C together can do in 10 days. Then how many boys from school A can set up the exhibition in one day?

A 80 Correct Answer Incorrect Answer
B 40 Correct Answer Incorrect Answer
C 60 Correct Answer Incorrect Answer
D 20 Correct Answer Incorrect Answer

Solution

The correct answer is B

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