Family River Crossing in 30 Seconds

Yes, they can all cross in exactly 30 seconds.

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Use the two fastest people (A and B) as the shuttle crew, and always have the fastest return with the boat.

We’ll use this proven optimal pattern for such problems:

1. A and B cross → 3 seconds
2. A returns → 1 second
3. D and E cross → 12 seconds
4. B returns → 3 seconds
5. A and C cross → 6 seconds
6. A returns → 1 second
7. A and B cross → 3 seconds

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