Heres another.
U2 has a concert they must all cross a bridge to get there. It is night. There is one flashlight. A maximum of two people can cross at one time. Any party who crosses, either 1 or 2 people must have the flashlight with them. The flashlight must be walked back and forth; it cannot be thrown, etc. Each band member walks at a different speed. A pair must walk together at the rate of the slower mans pace:
Bono:1 minute to cross
Edge:2 min
Adam:5 min
Larry:10 min
What is the shortest amount of time they can use to cross the bridge?
2006-08-24 12:40:00 · 8 answers · asked by Christina B 2 in Education & Reference ➔ Words & Wordplay
19
2006-08-24 12:45:53 · answer #1 · answered by Anonymous · 0⤊ 1⤋
19
2006-08-24 12:47:48 · answer #2 · answered by lonely_girl3_98 4 · 0⤊ 1⤋
19 minutes
2006-08-24 13:35:22 · answer #3 · answered by Mr Bean 3 · 0⤊ 1⤋
19 minutes
2006-08-24 12:45:17 · answer #4 · answered by bmwdriver11 7 · 0⤊ 1⤋
shouldn't it be larry taking each one across and then walking back? if his pace is the slowest? either 1 or 2 ppl must have the flashlight so bono can go alone.(without it) 17 minutes? hell, my head hurts now
2006-08-24 14:22:18 · answer #5 · answered by robyn 3 · 1⤊ 0⤋
19 minutes to cross.
Bono with Larry first, using 10 ,mins.
Bono going back, that is 1min and with Adam so 16mins consumed. Bono back again and lastly with Edge. Making it 19minutes in all.
2006-08-24 22:04:16 · answer #6 · answered by Anonymous · 0⤊ 1⤋
21 min.
2006-08-24 12:48:41 · answer #7 · answered by poison 2 · 0⤊ 1⤋
ok
2006-08-24 13:23:03 · answer #8 · answered by Anonymous · 0⤊ 2⤋