SOLUTION: help a family of 5 people move across the river by boat,and the boat is capable of a maximum of 2 people carrying capacity. time for traveling of each person in turn is 1s,3s,8s,an

Question 1011509: help a family of 5 people move across the river by boat,and the boat is capable of a maximum of 2 people carrying capacity. time for traveling of each person in turn is 1s,3s,8s,and 12s.if two people both go on the boat, the boat will travel at the speed of the slower person. In 30s please bring the whole family across the river.
Answer by ikleyn(52786) (Show Source): You can put this solution on YOUR website!
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Help a family of 5 people move across the river by boat,and the boat is capable of a maximum of 2 people carrying capacity. time for traveling of each person in turn is 1s, 3s, 8s, and 12s. If two people both go on the boat, the boat will travel at the speed of the slower person. In 30s please bring the whole family across the river.
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Hello,

I see here only 4 (four) times for traveling of each person in turn: 1s, 3s, 8s, and 12s. But there are 5 (five) persons.

What about the time #5?

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