• Your question is cut off & there is no figure. This type of problem, however, can usually be solved by 'unrolling' the cylinder into a rectangle, revealing the ants' path to be a straight line. If there's more than one turn around the cylinder you might have to represent this with additional copies of the rectangle side by side. Then it's usually a matter of applying the Pythagorean theorem to calculate the total path length as the hypotenuse of a right triangle whose sides are known or are readily calculated.

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