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The radius of a spherical balloon is tripled. The increase in volume as a percent is. 

Hans007  Oct 22, 2017
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If the radius is tripled....the volume increases by a cube of this = 27 times

 

So...if the volume doubles....that's a 100% increase =  (2 -1) * 100%

And if it triples....that's a 200% increase  =  (3 - 1) * 100%

 

So......an increase of 27 times gives a % increase of  (27 - 1) * 100%  =  2600%

 

 

cool cool cool

CPhill  Oct 22, 2017

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