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getzgetzu
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A wheel that has a radius of 24 rotates 270 degrees. How 05 May 2006, 23:11
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A wheel that has a radius of 24 rotates 270 degrees. How long did an edge point move?
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Professor
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A wheel that has a radius of 24 rotates 270 degrees. How Updated on: 17 May 2006, 20:25
Originally posted by Professor on 17 May 2006, 18:35.
Last edited by Professor on 17 May 2006, 20:25, edited 1 time in total.
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getzgetzu
A wheel that has a radius of 24 rotates 270 degrees. How long did an edge point move?
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a correction:

= (270/360) 2 pi (24)
= 36 pi

i should take a break for at least a week.....
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Natalya Khimich
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A wheel that has a radius of 24 rotates 270 degrees. How 17 May 2006, 20:17
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36Pi.

2*pi*24*3/4=36*pi
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ywilfred
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A wheel that has a radius of 24 rotates 270 degrees. How 17 May 2006, 20:23
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Diameter = pi * 24* 2 = 48pi

This is equivalent to 360 degress rotation.

So 270 degrees will give you 270/360 * 48pi = 36pi
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ywilfred
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A wheel that has a radius of 24 rotates 270 degrees. How 17 May 2006, 20:24
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Professor
getzgetzu
A wheel that has a radius of 24 rotates 270 degrees. How long did an edge point move?

= (270/360) pi (24)^2
= (3) pi (24x6)
= 432 pi
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Prof, you've gone for area instead of diameter :lol:
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Professor
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A wheel that has a radius of 24 rotates 270 degrees. How Updated on: 18 May 2006, 05:14
Originally posted by Professor on 17 May 2006, 20:28.
Last edited by Professor on 18 May 2006, 05:14, edited 1 time in total.
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ywilfred
Professor
getzgetzu
A wheel that has a radius of 24 rotates 270 degrees. How long did an edge point move?

= (270/360) pi (24)^2
= (3) pi (24x6)
= 432 pi

Prof, you've gone for area instead of diameter :lol:
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i was wonding why people make mistakes. now i realize why i make mistakes..

yes i went after area instead of perimeter. :wink: :wink: :wink:
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gmatmba
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A wheel that has a radius of 24 rotates 270 degrees. How 17 May 2006, 20:36
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yea 36 pi looks good
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jaynayak
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A wheel that has a radius of 24 rotates 270 degrees. How 19 May 2006, 01:43
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circumference - 2piR = 48pi
therefore the wheel moves 48pi in 360 deg
Hence it will move 270/360 * 48pi = 36 pi in 270 deg
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remgeo
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A wheel that has a radius of 24 rotates 270 degrees. How 19 May 2006, 02:31
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For 1 rotation ie. 360 degrees, the wheel moves 2*pi*r .
For 270 degrees it moves (270*48*pi)/360 = 36 pi



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