When the rectangle rotates around its side, a cylinder is formed. The height, in this case, will be 5 m, and the radius is 12 m.
The complete cylinder surface consists of a lateral surface and two bases:
Sp.p. = Sb.p. + 2 S main;
Let’s find the lateral surface area:
Sb.p. = 2πrh;
Sb.p. = 2 · 3.14 · 12 · 5 = 376.8 m2;
Now we are looking for the base area:
Sbas. = Πr ^ 2;
Sb. = 3.14 * 12 ^ 2 = 3.14 * 144 = 452.16 m2;
Sp.p. = 376.8 + 2 · 452.16 = 1281.12 m2.
Answer: the total surface area of this body is 1281.12 m2.
One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.