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A math application problem about ants (urgent! ! ! ~)
From your description, I guess the two small circles in it are tangent and tangent to the big circle, right?

Let the radius of the small circle be r and the radius of the big circle be 2r.

An ant: 2*π(2r)

Ant b: 2 * π * r+2 * π * r.

We know that their distance is equal, and they are all 4 π r.