Find the surface area of a rectangular parallelepiped with measurements 3 cm, 6 cm, 7 cm.

Given:
The side a of a rectangular parallelepiped is 3 centimeters.
Side b is 6 centimeters long.
Side c is 7 centimeters long.

Find the area of the first face:
S1 = a * b = 3 * 6 = 18 cm2.
Let’s calculate the area of the second face:
S2 = a * c = 3 * 7 = 21 cm2.
Let’s find what the area of the third face is equal to:
S3 = b * c = 6 * 7 = 42 cm2.
Find the area of the entire surface using the formula S = 2S1 + 2S2 + 2S3:
S = 2S1 + 2S2 + 2S3 = 2 * 18 + 2 * 21 + 2 * 42 = 36 + 42 + 84 = 162 cm2.
Answer: 162 cm2.