perplexus.info :: Just Math : Travelling

Travelling (Posted on 2006-10-30)

You are travelling to point B from point A at a speed of 30mph. You travel back to point A from Point B (taking the same route) at 60mph. What is your average speed?

Submitted by Paddy

Rating: 2.4000 (5 votes)

Solution: (Hide)

Your average speed is 40mph. You travel at 30 mph for twice as long as you travel at 60mph, therefore it is 120mph/3, instead of 90/2

Comments: ( You must be logged in to post comments.)

Subject	Author	Date
Puzzle Resolution: Simpler Method	K Sengupta	2022-01-28 07:24:38
Solution	Jonathan Lindgren	2007-07-08 05:34:46
re: Solution	sadegh	2006-12-11 17:10:22
re: Harmonic Mean	JLo	2006-10-31 12:45:56
re: Here's the solution	Richard	2006-10-31 11:58:54
Here's the solution	suresh	2006-10-31 10:28:28
re: Just for arguement	suresh	2006-10-31 10:23:21
re: Just for arguement	brianjn	2006-10-30 23:32:50
Harmonic Mean	Richard	2006-10-30 14:10:12
Puzzle Resolution	K Sengupta	2006-10-30 08:29:34
Solution	Lisa	2006-10-30 07:50:37
Just for arguement	Leming	2006-10-30 07:33:43

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