Math topic in the second day of junior high school: It is known that the radius of the cylinder bottom is 6cm and the height is 10cm. What is the shortest distance for ants to climb from point A to point B (the result is reserved)? ... Expand the edge of the cylinder to get a rectangle, and the route of the ant from A to B is the diagonal of half a moment.

That is, find the diagonal length of a right triangle.

One side of the right angle is 10, and the other side is half the circumference of the cylinder bottom, 6π.

The square of the hypotenuse is100+6x6x3.14x3.14 = 454.9456.

The hypotenuse is 2 1.3 (accurate to 0. 1cm).