Calculate Cube Height from 25 cm² Base Area: Geometric Problem Solving

Question

Below is a cube with a base area of 25 cm².

Is it possible to calculate the height of the cube? If so, what is it?

Video Solution

Solution Steps

00:10 Let's find the height of the cube.
00:13 We'll mark the height and the length of the cube.
00:17 Use the formula for the base area. That's the height times the length.
00:23 Remember, in a cube, all edges are the same. So, the length equals the height.
00:28 Now, substitute the values into the formula, and let's solve for height, H.
00:36 Next, take the square root. You'll find two possible solutions.
00:45 H must be positive, because it represents an edge length.
00:49 And that's how we solve the problem!

Step-by-Step Solution

To solve this problem, we'll follow these steps:

  • Step 1: Identify the given information
  • Step 2: Apply the appropriate formula
  • Step 3: Perform the necessary calculations

Now, let's work through each step:
Step 1: The problem gives us the base area of the cube, which is 25 cm².
Step 2: We'll use the formula for the area of a square: s2=25 s^2 = 25 , where s s is the side length of the base, and also the height of the cube.
Step 3: Solve the equation s2=25 s^2 = 25 by taking the square root of both sides to find s s , the height of the cube.

Therefore, the height s s of the cube is 25=5 \sqrt{25} = 5 cm.

Hence, the solution to the problem is 5 5 .

Answer

5 5