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How can they all get to the other side with their bag?

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A family need to cross a river in a small raft.
Father weighs 90 kg,
Mother weighs 80 kg,
Boy weighs 60 kg,
Girl weighs 40 kg,
and they have a 20 kg bag.

Rules:
1) The raft cannot bear a load heavier than 100 kg.

How can they all get to the other side with their bag?

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posted Jul 3, 2020 by Kapil Kapoor

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