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

To determine the volume of the oblique pyramid with a square base, we need to follow these steps:

1. Determine the area of the square base:
The edge length of the square base is [tex]\( 5 \)[/tex] cm. The area [tex]\( A \)[/tex] of a square is calculated using the formula:
[tex]\[ A = \text{side}^2 \][/tex]
For this pyramid:
[tex]\[ A = 5^2 = 25 \, \text{cm}^2 \][/tex]

2. Calculate the volume of the pyramid:
The formula for the volume [tex]\( V \)[/tex] of a pyramid is:
[tex]\[ V = \frac{1}{3} \times \text{base area} \times \text{height} \][/tex]
The height [tex]\( h \)[/tex] of the pyramid is [tex]\( 7 \)[/tex] cm, and the base area we previously computed is [tex]\( 25 \, \text{cm}^2 \)[/tex]. Therefore:
[tex]\[ V = \frac{1}{3} \times 25 \, \text{cm}^2 \times 7 \, \text{cm} \][/tex]
[tex]\[ V = \frac{1}{3} \times 175 \, \text{cm}^3 \][/tex]
[tex]\[ V = 58.333333333 \, \text{cm}^3 \][/tex]

3. Identify the closest answer option:
The volume of the pyramid is [tex]\( 58.333333333 \, \text{cm}^3 \)[/tex], which can be expressed as a mixed number for matching with the given options:
[tex]\[ V = 58 \frac{1}{3} \, \text{cm}^3 \][/tex]

Given the options:
- [tex]\( 11 \frac{2}{3} \, \text{cm}^3 \)[/tex]
- [tex]\( 43 \frac{3}{4} \, \text{cm}^3 \)[/tex]
- [tex]\( 58 \frac{1}{3} \, \text{cm}^3 \)[/tex]
- [tex]\( 87 \frac{1}{2} \, \text{cm}^3 \)[/tex]

The closest match is [tex]\( 58 \frac{1}{3} \, \text{cm}^3 \)[/tex].

Hence, the volume of the pyramid is:
[tex]\[ \boxed{58 \frac{1}{3} \, \text{cm}^3} \][/tex]