Maths

posted by .

2 men and 2 boys want to cross a river. None of them can swim and they have only 1 canoe. They can all paddle but the canoe will only hold 1 man or 2 boys.

How do they all get across? What is the minimum number of crossings required?

Both boys canoe across the first time, and one boy brings it back.

A man canoes across on the second trip, and the boy brings it back.

The two boys again cross the river, and one brings it back.

The other man makes the fourth crossing, and a boy brings it back.

The fifth crossing is made by both boys.


i need help with a question

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Physics

    A man with a mass of 65 kg stands up in a 64-kg canoe of length 4.0 m floating on water. He walks from a point 0.75 m from the back of the canoe to a point 0.75 m from the front of the canoe. Assume negligible friction between the …
  2. physics

    A man with a mass of 52 kg stands up in a 66-kg canoe of length 4.0 m floating on water. He walks from a point 0.75 m from the back of the canoe to a point 0.75 m from the front of the canoe. Assume negligible friction between the …
  3. physics

    A man with a mass of 50 kg stands up in a 66-kg canoe of length 4.0 m floating on water. He walks from a point 0.75 m from the back of the canoe to a point 0.75 m from the front of the canoe. Assume negligible friction between the …
  4. physics

    A man with a mass of 62 kg stands up in a 64-kg canoe of length 4.0 m floating on water. He walks from a point 0.75 m from the back of the canoe to a point 0.75 m from the front of the canoe. Assume negligible friction between the …
  5. physics

    A man with a mass of 58 kg stands up in a 69-kg canoe of length 4.0 m floating on water. He walks from a point 0.75 m from the back of the canoe to a point 0.75 m from the front of the canoe. Assume negligible friction between the …
  6. Math

    Jared can paddle his canoe 1 mile upstream in 1 hour, but it takes only a half hour to paddle back the same distance. Find the speed of water. (Hint: d=rt and the rate or canoe speed, depending on which way he is going.)
  7. physics

    A man with a mass of 64.1 kg stands up in a 61-kg canoe of length 4.00 m floating on water. He walks from a point 0.75 m from the back of the canoe to a point 0.75 m from the front of the canoe. Assume negligible friction between the …
  8. Physics

    A man (mass 120.5 kg) is canoeing with his friend (mass 81.6 kg). He had the only paddle but dropped it in the lake. It has drifted just out of his reach along the long axis of the canoe. His friend suggests that if they trade places …
  9. Physics

    A man with a mass(mm) of 71.9 kg stands up in a 95-kg canoe(mc) of length(l) 4.00 m floating on water. He walks from a point 0.75 m from the back of the canoe to a point 0.75 m from the front of the canoe. Assume negligible friction …
  10. PHYSICS

    JOHN WANTS TO PADDLE HIS CANOE ACROSS A RIVER THAT IS 200M WIDE, HE STARTS FROM THE EAST SIDE. THE WATER CURRENT FLOWS NORTH-SOUTH AT 0.5MS^-1. IT TAKES JOHN 252S TO CROSS THE RIVER. 1. DRAW A DIAGRAM TO GRAPHICALLY REPRESENT THE VELOCTY …

More Similar Questions