Pupils
Four pupils are going via the dark hall. Start at one side and have to get to the other side for 17 minutes. They have only one lamp for the trip. The corridor is narrow. They can go up two pupils at a time and at a slower speed. Each pupil went different speed. Carol passes the hall in one minute, Peter in two minutes, Ibrahim in 5 minutes, and Hugo in 10 minutes. In what order do they go?
Final Answer:
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Dr. Math
Order of transitions:
Karol and Jarka go to the other side (2 min).
Karol comes back (1 min).
Ivana and Hugo go to the other side (10 min).
Jarka comes back (2 min).
Karol and Jarka go to the other side (2 min).
Total time: 2 + 1 + 10 + 2 + 2 = 17 minutes.
Karol and Jarka go to the other side (2 min).
Karol comes back (1 min).
Ivana and Hugo go to the other side (10 min).
Jarka comes back (2 min).
Karol and Jarka go to the other side (2 min).
Total time: 2 + 1 + 10 + 2 + 2 = 17 minutes.
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Would you like to compute the count of combinations?
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combinatoricsbasic operations and conceptsUnits of physical quantitiesGrade of the word problem
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