Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: version B 2.10.2 9/18/84; site loral.UUCP
Path: utzoo!watmath!clyde!bonnie!akgua!sdcsvax!sdcc3!sdcc6!loral!sdi
From: sdi@loral.UUCP ()
Newsgroups: net.puzzle
Subject: Re: a good interview question (the solution)
Message-ID: <807@loral.UUCP>
Date: Wed, 13-Mar-85 13:04:46 EST
Article-I.D.: loral.807
Posted: Wed Mar 13 13:04:46 1985
Date-Received: Fri, 15-Mar-85 05:38:20 EST
References: <302@ssc-bee.UUCP> <463@petsd.UUCP>
Reply-To: sdi@loral.UUCP
Organization: Loral Instrumentation, San Diego
Lines: 28
Summary: 

In article <463@petsd.UUCP> joe@petsd.UUCP (PUT YOUR NAME HERE) writes:
>Distribution:
>Organization: Perkin-Elmer DSG, Tinton Falls, N.J.
>Keywords:
>
>In article <302@ssc-bee.UUCP> thill@ssc-bee.UUCP (Tom Hill) writes:
>>	You have to travel from town A. to town B.   The distance
>>	between the two towns is 2 miles.  If you drive 30 mph for the
>>	first mile, how fast do you have to drive the second mile in
>>	order to average 60 mph?
>>
>>It can be tricky if you don't think about it.
>
>Your right about that.  I thought about it and here is the answer:
>
>	It can't be done.
>
>Explanation: In order to average 60 mph, you must travel 1 mile in 1 minute.
>Therefore, you must travel the 2 miles in 2 minutes.  But, you have already
>taken 2 minutes to travel the first mile, so even if you go "faster than
>greased lightning" in the second mile, you won't make the 60mph average.

***********
Question:  The original question says nothing about time.  Why can't you go
30mph for the first mile and 90mph for the second mile, therefore averaging
out to 60mph.  If you are driving along going 30mph for 1 mile and then
90mph in the next, you are averaging 60mph for the 2 miles.  Am I missing
something here?