Question
A boat can take either 10 adults or 15 children. There are 4 boats altogether and there are 9 children in each of the boats. What is the maximum number of adults the boats can still take?
2 m

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A boat can take either 10 adults or 15 children. There are 4 boats altogether and there are 9 children in each of the boats. What is the maximum number of adults the boats can still take?