Miquel, Colin, Cody and Alejandro have to walk through a long dark tunnel. They only have one torch between them so a maximum of two people can go through the tunnel at any one time. Each person takes a different amount of time to get through the tunnel and if two people walk together they must walk at the rate of the slowest.
Miquel takes 3 minutes,
Colin takes 5 minutes,
Cody takes 8 minutes,
Alejandro takes 11 minutes.
What is the least amount of time for all four to walk through the tunnel?
If Cody and Alejandro walk through the tunnel together it will take 11 minutes, If Cody then walks the torch back through the tunnel a total of 19 minutes will have passed. Continue till all four are at the other end of the tunnel.
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Miquel and Colin walk through taking 5 minutes
Miquel walks back with the torch taking 3 minutes [8 minutes total]
Cody and Alejandro walk through taking 11 minutes [19 minutes total]
Colin walks back with the torch taking 5 minutes [24 minutes total]
Miquel and Colin walk through taking 5 minutes [29 minutes total]
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Teacher, do your students have
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