Riddle help!?!
Question: Can anyone help me with this puzzle or riddle, whatever you want to call it.
Ok then here goes;
A group of high school students wish to cross a bridge without siderails in the middle of the jungle very late at night. They have one lantern to share. No one may take a step without holding the lantern ( its dark with no moon). No more than 2 people may be on the bridge at one time, not evenfor a moment. What is the shortest time it would take for ll of them to get across?
Info:
Joe can cross bridge alone in 5 minutes
Torey can cross bridge alone in 10 minutes
Sarah can cross bridge alone in 20 minutes
Mike can cross the bridge in 25 minutes due to his sore ankle
Also, when 2 students walk together, the must move at the rate of the slowest person!
First correct answer gets 10 pts!
>.> this has so many combos, i keep doing it but i still dont get it..
Answers: Can anyone help me with this puzzle or riddle, whatever you want to call it.
Ok then here goes;
A group of high school students wish to cross a bridge without siderails in the middle of the jungle very late at night. They have one lantern to share. No one may take a step without holding the lantern ( its dark with no moon). No more than 2 people may be on the bridge at one time, not evenfor a moment. What is the shortest time it would take for ll of them to get across?
Info:
Joe can cross bridge alone in 5 minutes
Torey can cross bridge alone in 10 minutes
Sarah can cross bridge alone in 20 minutes
Mike can cross the bridge in 25 minutes due to his sore ankle
Also, when 2 students walk together, the must move at the rate of the slowest person!
First correct answer gets 10 pts!
>.> this has so many combos, i keep doing it but i still dont get it..
Since there is only one lantern, one person will have to come back with the lantern after crossing. The fastest method would be to have the fastest person keep coming back with the lantern to help the next person across.
So if Joe is chosen to carry the lantern, he can escort Torrey across in 10 minutes, come back in 5, Sarah in 20, back in 5, and Mike in 25.
That makes it a total of 65minutes.
25 minutes
umm...45 minutes??
65 minutes
70min
they can never all get over there going by the rules
65 mins.
50 minutes.
Joe and Torey cross together. 10 minutes
Joe comes back alone. 5 minutes
Sarah and Mike go together. 25 minutes
Torey comes back. 10 minutes
Joe and Torey cross together again. 10 minutes
Total 60 minutes.