problem 226 mathcounts

Mathematics
Tutor: None Selected Time limit: 1 Day

A boat can hold three people, one of whom needs to row across a river that is 20 yards wide. What is the minimum distance the boat must travel to transport 9 people from the left bank of the river to the right bank?

Sep 21st, 2014

3 people in which one should always be on boat to row = 20 yard

Then the minimum distance is 140 yards

Because the man which has to row the boat will have round four times including him, which makes  them total nine peoples.

Sep 21st, 2014

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Sep 21st, 2014
Dec 5th, 2016
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