SOLUTION: Eight adults and two children need to cross a river, and they have one small boat available to help them. The boat can hold either one adult, or one or two children. Everyone in

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Question 145741: Eight adults and two children need to cross a river, and they have one small boat available to help them. The boat can hold either one adult, or one or two children. Everyone in the group is able to row the boat. Show how you get them all across the river.
How many one-way trips does it take for the eight adults and two children to cross the river?
Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
two children cross __ one rows back __ one adult crosses __ child rows back

repeat cycle until all adults are across (7 more times)

last trip is two children crossing to join 8 adults

4*8+1 or 33 crossings