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The oblique pyramid has a square base with an edge length of [tex]$5 \, \text{cm}[tex]$[/tex]. The height of the pyramid is [tex]$[/tex]7 \, \text{cm}$[/tex].

What is the volume of the pyramid?

A. [tex]11 \frac{2}{3} \, \text{cm}^3[/tex]
B. [tex]43 \frac{3}{4} \, \text{cm}^3[/tex]
C. [tex]58 \frac{1}{3} \, \text{cm}^3[/tex]
D. [tex]87 \frac{1}{2} \, \text{cm}^3[/tex]


Sagot :

### Step-by-Step Solution:

1. Identify the Given Values:
- The edge length of the square base of the pyramid is \( 5 \, \text{cm} \).
- The height of the pyramid is \( 7 \, \text{cm} \).

2. Calculate the Area of the Base:
Since the base is a square, the area \( A \) of the base can be calculated using the formula for the area of a square:
[tex]\[ \text{Area of the base} = \text{edge length}^2 = 5 \, \text{cm} \times 5 \, \text{cm} = 25 \, \text{cm}^2 \][/tex]

3. Use the Formula for the Volume of a Pyramid:
The volume \( V \) of a pyramid is given by the formula:
[tex]\[ V = \frac{1}{3} \times \text{Base Area} \times \text{Height} \][/tex]
Substituting the values we calculated and were given:
[tex]\[ V = \frac{1}{3} \times 25 \, \text{cm}^2 \times 7 \, \text{cm} \][/tex]

4. Perform the Multiplications:
First, multiply the base area by the height:
[tex]\[ 25 \, \text{cm}^2 \times 7 \, \text{cm} = 175 \, \text{cm}^3 \][/tex]

5. Divide by 3:
Now, divide the product by 3 to find the volume:
[tex]\[ V = \frac{175 \, \text{cm}^3}{3} = 58.33333333333333 \, \text{cm}^3 \][/tex]

6. Express the Volume as a Mixed Number:
To express the volume as a mixed number:
[tex]\[ 58.33333333333333 \approx 58 \frac{1}{3} \, \text{cm}^3 \][/tex]

### Conclusion:
The volume of the pyramid, given a square base with edge length \( 5 \, \text{cm} \) and a height of \( 7 \, \text{cm} \), is:
[tex]\[ 58 \frac{1}{3} \, \text{cm}^3 \][/tex]

### Answer:
[tex]\[ \boxed{58 \frac{1}{3} \, \text{cm}^3} \][/tex]