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#1 2016-05-22 06:25:45

dazzle1230
Member
Registered: 2016-05-17
Posts: 92

Geometry

Help on this question:

The second hand on the clock pictured below is 6 cm long. How far in centimeters does the tip of this second hand travel during a period of 30 minutes? Express your answer in terms of pi.

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#2 2016-05-22 06:34:29

zetafunc
Moderator
Registered: 2014-05-21
Posts: 2,107
Website

Re: Geometry

Can you determine the circumference of the clock?

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#3 2016-05-22 07:02:15

MathWA
Member
From: Somewhere over the rainbow
Registered: 2016-05-22
Posts: 12
Website

Re: Geometry

Where is the picture?


We cannot solve our problems with the same thinking we used when we created them.

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#4 2016-05-22 20:23:30

bob bundy
Administrator
Registered: 2010-06-20
Posts: 8,137

Re: Geometry

hi dazzle1230

The second hand is the radius  and it sweeps out circles as time passes.  So firstly work out the circumference of that circle (2 times pi times radius) then work out how many circuits it will do in that time .  One per minute. Don't use 3.14 or other for pi ... just leave the answer a N.pi where N is a number.

Bob

MathWA: I don't see the picture either, but, do you really need it for this question?  smile


Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei

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#5 2016-05-22 20:48:58

Relentless
Member
Registered: 2015-12-15
Posts: 624

Re: Geometry

Quite a distance (:

Last edited by Relentless (2016-05-22 20:50:21)

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#6 2016-05-22 22:45:14

bob bundy
Administrator
Registered: 2010-06-20
Posts: 8,137

Re: Geometry

hi Relentless

Thanks for posting that.  It made me check and edit my hint.  Please read my corrected version.

Bob


Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei

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#7 2016-06-01 13:33:15

dazzle1230
Member
Registered: 2016-05-17
Posts: 92

Re: Geometry

Thanks for the help!!!

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