Question

Difficulty: EasyVolume and Surface Area of 3D Figures

A cube-shaped block has an edge length of 55 centimeters. What is the total surface area of the block in square centimeters?

  1. A
    25
  2. B
    125
  3. 150Answer
  4. D
    900

Answer

The total surface area of the cube is 150 square centimeters.
The total surface area of a cube is calculated using the formula SA=6s2SA = 6s^2, where ss is the edge length. Substituting s=5s = 5 gives 6(5)26(5)^2. By following the order of operations, square the 55 first to get 2525, and then multiply by 66 to find the total surface area of 150150 square centimeters.

Step-by-Step Solution

1
Identify the formula for the total surface area of a cube.
SA=6s2SA = 6s^2
A cube has 6 identical square faces, and the area of each face is the edge length squared (s2s^2).
2
Substitute the given edge length (s=5s = 5) into the formula.
SA=6(5)2SA = 6(5)^2
This sets up the equation with the specific dimensions of the block.
3
Evaluate the exponent first, following the order of operations.
52=255^2 = 25
Exponents must be calculated before multiplication.
4
Multiply the area of one face by the number of faces.
6×25=1506 \times 25 = 150
This provides the combined area of all 6 faces, which is the total surface area.

Key Concept

Volume and Surface Area of 3D Figures
Estimated Time:45s
Rate this question