Difference between revisions of "2024 AIME II Problems/Problem 8"
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| − | Torus T is the surface produced by revolving a circle with radius 3 around an axis in the plane of the circle that is a distance 6 from the center of the circle (so like a donut). Let S be a sphere with a radius 11. When T rests on the outside of S, it is externally tangent to S along a circle with radius <math>r_i</math>, and when T rests on the outside of S, it is externally tangent to S along a circle with radius <math>r_o</math>. The difference <math>r_i-r_o</math> can be written as <math>\frac{m}{n}</math>, where <math>m</math> and <math>n</math> are relatively prime positive integers. Find m+n. | + | Torus <math>T</math> is the surface produced by revolving a circle with radius 3 around an axis in the plane of the circle that is a distance 6 from the center of the circle (so like a donut). Let <math>S</math> be a sphere with a radius 11. When <math>T</math> rests on the outside of <math>S</math>, it is externally tangent to <math>S</math> along a circle with radius <math>r_i</math>, and when <math>T</math> rests on the outside of <math>S</math>, it is externally tangent to <math>S</math> along a circle with radius <math>r_o</math>. The difference <math>r_i-r_o</math> can be written as <math>\frac{m}{n}</math>, where <math>m</math> and <math>n</math> are relatively prime positive integers. Find <math>m+n</math>. |
Revision as of 21:29, 8 February 2024
Torus 
is the surface produced by revolving a circle with radius 3 around an axis in the plane of the circle that is a distance 6 from the center of the circle (so like a donut). Let 
be a sphere with a radius 11. When rests on the outside of , it is externally tangent to along a circle with radius 
, and when rests on the outside of , it is externally tangent to along a circle with radius 
. The difference 
can be written as 
, where 
and 
are relatively prime positive integers. Find 
.
