Jan 25, 2003
Well, the father weighs 170. The mother says she weighs 130. The son is 90 pounds. And the daughter is 80. The dog weighs 15 pounds. Everyone can row except the dog, who can swim. And the question is: is there any way the family can be saved? And if so, what are the fewest number of crossings to save everyone?
RAY: Now, the fact that the dog can swim is a red herring. Because the dog doesn't have to swim at all.
Here's how it's done. The boy and the girl row over to the mainland.
TOM: And that's 170 pounds.
RAY: One of them comes back. Doesn't matter which one. The next trip the mother and the dog row to safety.
TOM: Got it. So now we got one of the kids over there, the mother and the dog.
RAY: But now the other kid comes back. So the only two that have reached safety so far are the mother and the dog. The boy and the girl row over again. One of them comes back. The father rows over. The other kid comes back to the island and now the two kids row to safety together. And then when they get there, they look for the car.
TOM: How many trips was that?
RAY: It's nine crossings. So who's our winner?
TOM: The winner is Jack Mueller from Dickson, California.