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Liz, Brian, Dean and Les have to cross a bridge. They all begin on the same side. They have to get everyone across in 17 min. They have to cross in 2 peeps w/ a flashlight. With everyparty the flashlight MUST cross with them. The flashlight must be walked back and forth and CAN NOT be thrown! Each student walks ant a different speed. A PAIR must walk at the slower person's pace.
Liz- 1 min to cross
Brian- 2 min to cross
Dean- 5 min to cross
Les- 10 min to cross
HELP PLEASE! this problem is evil!