# Find the surface area of a rectangular parallelepiped whose length is 12 cm, the width is 7 cm

June 30, 2021 | education

| **Find the surface area of a rectangular parallelepiped whose length is 12 cm, the width is 7 cm less than the length and the height is 2 cm more than the width, find the sum of the lengths of all the edges**

Determine how many centimeters the width of the rectangular parallelepiped is equal to:

12 – 7 = 5.

Determine how many centimeters the height of the rectangular parallelepiped equals:

5 + 2 = 7.

Determine the surface area of the specified rectangular parallelepiped:

2 (12 * 5 + 5 * 7 + 12 * 7) = 358.

Let’s define the sum of all edges of the specified rectangular parallelepiped:

4 * (5 + 7 + 12) = 96.

Answer: The surface area of the parallelepiped is 358 cm2, and the sum of all the edges is 96 cm.

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