### Chork's Puzzle 44

Difficulty Rating: 1

It was raining really heavily and 4 children, Armin, Bob, Chork and Don were stuck in school. They all wanted to get to the nearby MRT station but the route there was completely unsheltered and they all didn't want to get wet. Luckily, they had an umbrella. However, the umbrella could only shelter 2 people at any one time.

Armin takes 3 minutes to cover the distance from school to the MRT station (and vice versa). Bob takes 4 minutes. Chork takes 6 minutes and Don, who is rather slow, takes 10 minutes.

Now, their task is to get to the MRT station in the shortest time possible. However, note that when 2 people are sharing an umbrella, the faster person must accomodate the slower one and walk at his speed. Also, someone would have to bring the umbrella from the MRT station back to school so that the remaining children can continue using the umbrella.

It was raining really heavily and 4 children, Armin, Bob, Chork and Don were stuck in school. They all wanted to get to the nearby MRT station but the route there was completely unsheltered and they all didn't want to get wet. Luckily, they had an umbrella. However, the umbrella could only shelter 2 people at any one time.

Armin takes 3 minutes to cover the distance from school to the MRT station (and vice versa). Bob takes 4 minutes. Chork takes 6 minutes and Don, who is rather slow, takes 10 minutes.

Now, their task is to get to the MRT station in the shortest time possible. However, note that when 2 people are sharing an umbrella, the faster person must accomodate the slower one and walk at his speed. Also, someone would have to bring the umbrella from the MRT station back to school so that the remaining children can continue using the umbrella.

What is the shortest time needed to get all 4 children to the MRT station, sheltered with an umbrella?

If you know the answer, post it in the comments section of this post.

If you know the answer, post it in the comments section of this post.

## 5 Comments:

At Thursday, November 02, 2006 8:15:00 PM, Anonymous said…

26 min? poor armin.

At Thursday, November 02, 2006 10:57:00 PM, chorkie said…

your answer is incorrect. hmm. poor bob too, isnt it? ;)

At Friday, November 03, 2006 8:23:00 AM, chorkie said…

out of curiosity how many anonymous-es are there? o_O

At Friday, November 03, 2006 10:02:00 AM, Anonymous said…

41 wasn't me. neither was this first post. i'd say 25 min.

still can't figure out who am i? by the way, u do know me. should have figured that out by now right? (:

;)

At Friday, November 03, 2006 10:14:00 AM, chorkie said…

Yepp 25 is correct, not 26. Weird that you should get 26 though. Normally people would get 27. Haha. If you spotted the shorter method it would have been 25 already. :/

Hmm... haha. yea i guess u r sum1 i know, but i still dont know who u r. :P

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