Question 784673
The length of the cylinder is usually called its height.<P>
The lateral surface area - the area of the curved surface of a cylinder - is the circumference of the circle formed by the curved surface x the height of the cylinder (in this case what is called the length = 6cm).  The circumference is 2*pi*r.<P>
2*pi*r*6 = 130<P>
r = 130/2*pi*6 = approximately 3.45 centimeters.