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The formula [tex]\( s = \sqrt{\frac{SA}{6}} \)[/tex] gives the length of the side, [tex]\( s \)[/tex], of a cube with a surface area, [tex]\( SA \)[/tex].

How much longer is the side of a cube?

A. [tex]\( \sqrt{5} \, \text{m} \)[/tex]
B. [tex]\( \sqrt{35} \, \text{m} \)[/tex]
C. [tex]\( \sqrt{210} \, \text{m} \)[/tex]
D. [tex]\( 7\sqrt{5} \, \text{m} \)[/tex]


Sagot :

Certainly! Let's go through a detailed, step-by-step solution to determine how much longer each of the given cube sides is relative to the side length [tex]\(\sqrt{5} \, m\)[/tex].

### Step 1: Identify Cube Side Lengths
We are given the side lengths of four cubes:
1. [tex]\( \sqrt{5} \, m \)[/tex]
2. [tex]\( \sqrt{35} \, m \)[/tex]
3. [tex]\( \sqrt{210} \, m \)[/tex]
4. [tex]\( 7 \sqrt{5} \, m \)[/tex]

### Step 2: Determine Differences
We need to find the difference between each side length and [tex]\(\sqrt{5} \, m\)[/tex]:
1. Difference between [tex]\( \sqrt{35} \, m \)[/tex] and [tex]\( \sqrt{5} \, m \)[/tex]
2. Difference between [tex]\( \sqrt{210} \, m \)[/tex] and [tex]\( \sqrt{5} \, m \)[/tex]
3. Difference between [tex]\( 7 \sqrt{5} \, m \)[/tex] and [tex]\( \sqrt{5} \, m \)[/tex]

### Step 3: Compute Differences
Now, let's compute these differences:

1. Difference between [tex]\( \sqrt{35} \, m \)[/tex] and [tex]\( \sqrt{5} \, m \)[/tex]:
[tex]\[ \sqrt{35} - \sqrt{5} \approx 3.680 \, m \][/tex]

2. Difference between [tex]\( \sqrt{210} \, m \)[/tex] and [tex]\( \sqrt{5} \, m \)[/tex]:
[tex]\[ \sqrt{210} - \sqrt{5} \approx 12.255 \, m \][/tex]

3. Difference between [tex]\( 7 \sqrt{5} \, m \)[/tex] and [tex]\( \sqrt{5} \, m \)[/tex]:
[tex]\[ 7 \sqrt{5} - \sqrt{5} = 6 \sqrt{5} \approx 13.416 \, m \][/tex]

### Step 4: Provide Final Answers
Based on the computed differences:

- The side length of [tex]\( \sqrt{35} \, m \)[/tex] is approximately [tex]\( 3.680 \, m \)[/tex] longer than [tex]\( \sqrt{5} \, m \)[/tex].
- The side length of [tex]\( \sqrt{210} \, m \)[/tex] is approximately [tex]\( 12.255 \, m \)[/tex] longer than [tex]\( \sqrt{5} \, m \)[/tex].
- The side length of [tex]\( 7 \sqrt{5} \, m \)[/tex] is approximately [tex]\( 13.416 \, m \)[/tex] longer than [tex]\( \sqrt{5} \, m \)[/tex].

These are the lengths by which each side is longer than the initial side length of [tex]\( \sqrt{5} \, m \)[/tex].