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# Crossing the River

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Challenge problems annoy me, figuratively and literally, especially when there's a twist in the story as well.

So, I discovered this problem a couple of days ago, and ummm, help?

On one side of a riverbank, there are two 200 lb. adults and two 100 lb. children. They have a rowboat, which anyone can row, but the boat can only hold a maximum of 200 lbs. How will they manage to get everyone across the river using only the rowboat? They can't swim! Can you come up with a solution?

How is this even possible?

Thanks! :)

Jun 1, 2024
edited by NotThatSmart  Jun 1, 2024

#1
+129487
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Resulting situation

2 C row over 1 C comes back      →         1C 2A         1C

1A rows over 1 C comes back      →         2C 1A         1A

2C  row over  1 A comes back      →         2A               2C

1A  rows over 1C comes back      →        1A 1C         1C 1A

1A rows over 1C comes back       →          2C              2A

2C row over                                   →          0                 2C 2A

Jun 1, 2024
#2
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Oh wait! That's so smart.

I totally forgot that the children could row the boat back!

I was confused since only one adult could fit on the boat, meaning it would be "impossible" to succeed! I totally missed out on that LOL.

Well, thanks a lot CPhill!

~NotThatSmart

NotThatSmart  Jun 1, 2024
#3
+129487
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LOL!!!   Thanks !!!!

CPhill  Jun 1, 2024