Four people (named A, B, C, and D) need to walk from Starnets to Univerna during a really bad heat wave. The heat is so bad, it's not possible to cross the open desert without some sort of shade. Fortunately, they have one umbrella. Unfortunately, however, only a maximum of two people at a time can fit under the umbrella. A can cross the desert alone in 20 minutes. B can make the crossing alone in 16 minutes. C can make the crossing alone in 8 minutes. And D can make the crossing in 4 minutes. Note that when two people are making the crossing, they must do so at the pace of the slower person!
What is the minimum number of minutes that it will take for all of the people to safely be together in Univerna?
2006-07-28 09:59:09 · 7 answers · asked by Sakura X 2 in Entertainment & Music ➔ Jokes & Riddles
4 + 8 across = 8min
4 comes back = 4min
20+16 across = 20min
8 comes back = 8 min
4+8 across = 8 min
48min total
2006-07-28 10:04:01 · answer #1 · answered by iamigloo 6 · 0⤊ 1⤋
15
2006-07-28 17:13:31 · answer #2 · answered by Anonymous · 0⤊ 0⤋
4 + 8 across = 8 min
8 comes back = 8 min
20 + 16 across = 20 min
4 comes back = 4 min
4 + 8 across = 8 min
48 min total
2006-07-28 17:40:09 · answer #3 · answered by Monica C 1 · 0⤊ 0⤋
68 minutes
2006-07-28 19:45:56 · answer #4 · answered by fungirl 3 · 0⤊ 0⤋
52 minutes!
2006-07-28 17:03:21 · answer #5 · answered by *apes* 3 · 0⤊ 0⤋
# 1 IS RIGHT, darn, i wanted 10 points :(
2006-07-28 17:03:47 · answer #6 · answered by Feeling Froggy 3 · 0⤊ 0⤋
52 damn
2006-07-28 17:04:10 · answer #7 · answered by downdrain 4 · 0⤊ 0⤋