Find the area of a rectangular parallelepiped with: width 5 cm, length 2 cm and height 3 cm.

Given:
a = 5 cm;
b = 2 cm;
s = 3 cm;
S =? cm²;
A parallelepiped is a three-dimensional geometric figure, it is a polyhedron that consists of six faces. A rectangle lies at the base of the parallelepiped. Knowing the parameters of the parallelepiped, we find the area by the formula: S = 2 (ab + ac + bc)
S = 2 (ab + ac + bc) = 2 * (5 + 2 + 2 + 3 + 3 + 5) = 2 * (7 + 5 + 8) = 2 * 20 = 40 (cm²)
Answer: 40 cm² is the area of a rectangular parallelepiped with a width of 5 cm, a length of 2 cm and a height of three centimeters.