Marcus is making a spherical soaps to sell in his online store. The surface area of the soap is 63.585 in.^2 and he whants them into a cube box so that it fits snugly. Using 3.14 as the value of pi what should be the dimensions of the cube box?

4 in x 4 in x 4 in
4.5 in x 4.5 in x 4.5 in
1.2 in x 1.2 in x 1.2 in
2.25 in x 2.25 in x 2.25 in

3 answers

To find the dimensions of the cube box that can snugly fit the spherical soap, we first need to determine the radius of the soap based on its surface area.

The formula for the surface area \( S \) of a sphere is given by:

\[ S = 4\pi r^2 \]

Where \( r \) is the radius of the sphere. We can rearrange this formula to solve for \( r \):

\[ r^2 = \frac{S}{4\pi} \]

Substituting the values we have:

\[ S = 63.585 \text{ in}^2 \] \[ \pi = 3.14 \]

Now we can calculate \( r \):

\[ r^2 = \frac{63.585}{4 \times 3.14} \] \[ r^2 = \frac{63.585}{12.56} \approx 5.06 \]

Taking the square root to find \( r \):

\[ r \approx \sqrt{5.06} \approx 2.25 \text{ in} \]

Since the sphere fits snugly in a cube, the diameter of the sphere will be equal to the side length of the cube. The diameter \( d \) of the sphere is given by:

\[ d = 2r \approx 2 \times 2.25 \approx 4.5 \text{ in} \]

Thus, the dimensions of the cube box should be at least \( 4.5 \text{ in} \times 4.5 \text{ in} \times 4.5 \text{ in} \) to fit the soap snugly.

Among the given choices, the correct dimensions for the cube box would be:

4.5 in x 4.5 in x 4.5 in

you sure-?

Let's double-check the calculations step-by-step to ensure the correct determination of the cube dimensions necessary to fit the soap.

Step 1: Surface Area of the Sphere

Given the surface area \( S \) of the sphere is \( 63.585 , \text{in}^2 \), we use the formula:

\[ S = 4\pi r^2 \]

Step 2: Rearranging to Find the Radius

We rearrange the formula to find \( r \):

\[ r^2 = \frac{S}{4\pi} \]

Substituting \( S \) and \( \pi = 3.14 \):

\[ r^2 = \frac{63.585}{4 \times 3.14} = \frac{63.585}{12.56} \approx 5.06 \]

Step 3: Calculating the Radius

Now we take the square root to find the radius \( r \):

\[ r \approx \sqrt{5.06} \approx 2.25 , \text{in} \]

Step 4: Determine the Diameter

The diameter \( d \) of the sphere is:

\[ d = 2r = 2 \times 2.25 \approx 4.5 , \text{in} \]

Step 5: Dimensions of the Cube

The diameter of the sphere tells us the minimum dimensions required for the cube box since the cube must be able to snugly contain the sphere. Therefore, the side length of the cube box must be at least equal to the diameter of the sphere.

Conclusion

So, the minimum dimensions of the cube box to fit the sphere snugly would indeed be \( 4.5 , \text{in} \times 4.5 , \text{in} \times 4.5 , \text{in} \).

Therefore, the dimensions of the cube box should be: 4.5 in x 4.5 in x 4.5 in.

Yes, I confirm that my previous answer is correct!