Respuesta :

HomertheGenius
Circumference of the base of a cylinder:
C = 2 π r = Length of a rectangle ( h - Width )
Answer: B ) 2 π r

carlosego
For this case the lateral area of the cylinder is given by:
 [tex]A = 2 * \pi * R * h [/tex]
 Where,
 R: radius of the base of the cylinder
 h: cylinder height
 The length of the rectangle is:
 [tex]L = \frac{A}{h} [/tex]
 Substituting values:
 [tex]L = \frac{2 * \pi * R * h}{h} [/tex]
 Simplifying we have:
 [tex]L = 2 * \pi * R [/tex]
 Answer:
 B) 2 * pi * r

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