Crossing The River

Kaycee

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Aug 26, 2005
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An Adult weighing 80 Kilograms and 2 children, each of whom weighs 40 kilograms, want to cross a river. All 3 are capable of rowing the one boat they have. The boat is capable of holding only 80 kilograms on any one trip. How many trips will it take to get all 3 across a river? Describe your answer.
 
How far have you gotten? You know the adult can't go first, since the boat would then be left on the other side with no way of being returned. So...?

Eliz.
 
Crossing the River

So far I think both children go first then drop one child off then the other child go back for the adult then let the adult go then the child that went first will come back to get the other child then they will both go back together.

Am I on the right track

Kaycee
 
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