The sides of the base of the rectangle of the parallelepiped are 3 cm and 6 cm

The sides of the base of the rectangle of the parallelepiped are 3 cm and 6 cm, and the height is 8 cm, find the area of the side and full surface.

1. Formula of the lateral surface area of a rectangular parallelepiped Sside = 2 * h * (a + b), where h is the height, a, b are the sides of the base. Let’s calculate:

Side = 2 * 8 * (3 + 6) = 2 * 8 * 9 = 144 (cm2).

2. The total surface area is calculated by the formula Spol = Sbok + 2 * Sb, where Sb is the area of the base. Let’s calculate:

Sb = a * b = 3 * 6 = 18 (cm2);

Spol = 144 + 2 * 18 = 144 + 36 = 180 (cm2).

Answer: the lateral surface area is 144 cm2, the total surface area is 180 cm2.