A Boy, a Girl, a Dog, and a Bicycle (Posted on 2004-02-03)

	Submitted by DJ
Rating: 4.1818 (11 votes)
Solution:	(Hide)
2 hours, 45 minutes First note that there's no apparent way to benefit from letting either the boy or girl ride the bike longer than the other. Any solution which gets the boy there faster, must involve him using the bike (forward) more; similarly for the girl. Thus the bike must go backwards more for it to remain within the 10-mile route. Thus the dog won't make it there in time. So the solution assumes they ride the bike for the same amount of time. Also note that there's no apparent way to benefit from letting any of the three arrive at the finish ahead of the others. If they do, they can probably take time out to help the others. So the solution assumes they all finish at the same time. The boy starts off on the bike, and travels 5.4 miles. At this point, he drops the bike and completes the rest of the trip on foot. The dog eventually reaches the bike, and takes it backward .8 miles (so the girl gets to it sooner) and then returns to trotting. Finally, the girl makes it to the bike and rides it to the end. The answer is 2.75 hours.

	Subject	Author	Date
	suppliment for dog	Hayden Franki	2022-11-12 08:28:44
	suppliment for dog	Hayden Franki	2022-11-12 08:27:58
	Dog Food	Hayden Franki	2022-10-18 11:12:01
	No Subject	K Sengupta	2022-09-09 12:08:22
	re: answer	KaiCooke	2022-07-02 04:07:23
	Puzzle Solution	K Sengupta	2008-06-06 01:46:51
	answer	K Sengupta	2007-07-28 12:48:00
	re: A Boy, a Girl, a Dog, and a Bicycle	Richard	2004-02-11 21:11:39
	A Boy, a Girl, a Dog, and a Bicycle	Chuck Horn	2004-02-11 14:25:17
	re(4): solution	dave domingo	2004-02-04 15:15:36
	re(3): solution	Brian Wainscott	2004-02-04 13:38:30
	re(3): solution	SilverKnight	2004-02-04 13:02:53
	re(2): solution	dave domingo	2004-02-04 12:48:31
	Solution	Brian Smith	2004-02-04 10:44:36
	re(2): Better late than never...	SilverKnight	2004-02-04 06:23:12
	re: Better late than never...	Jils	2004-02-04 06:17:46
	Another meanie on the flooble website ??	Penny	2004-02-04 00:00:59
	my answer	meanie	2004-02-03 22:04:36
	re: Better late than never...	Richard	2004-02-03 20:40:21
	Better late than never...	Brian Wainscott	2004-02-03 19:24:17
	re: solution	SilverKnight	2004-02-03 14:58:07
	solution	dave domingo	2004-02-03 14:37:22
	i know how but not how fast	dave domingo	2004-02-03 14:19:34
	Solution	steve	2004-02-03 13:59:17
	Theoretical minimum that can't be done logistically.	Charlie	2004-02-03 13:40:35
	fun	dave domingo	2004-02-03 13:33:03