Re: Calculus problem??

From: Robert Israel (israel_at_math.ubc.ca)
Date: 10/21/04 

Date: 21 Oct 2004 06:36:01 GMT

In article <JWFdd.255$Qg3.72@news02.roc.ny>,
Steven <sgottlieb60@hotmail.com> wrote:
>You have a circle of radius r ft centered at the origin. 2 people start
>walking at the same time at the same rate of s ft/sec. The first person
>walks around the circle starting at (-r,0) while a second person starts at
>(r,0) and walks along the ax axis. When will the person walking around the
>circle see the second person??

Are you supposed to assume that the circle is opaque, i.e. the first
person sees the second when the line segment between them does not pass
inside the circle? And the second person is walking to the right?
Then I get approximately 1.92029909425715536093197139192 r/s seconds.

Robert Israel israel@math.ubc.ca
Department of Mathematics http://www.math.ubc.ca/~israel
University of British Columbia Vancouver, BC, Canada

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