1. **State the problem:** We have a prism with a square cross-section of side 13 cm and depth 5 cm. There is a circular hole through the prism with diameter 6 cm. We need to find the volume of the shape after the hole is removed.
2. **Formula for volume of prism:**
$$V = \text{area of cross-section} \times \text{depth}$$
3. **Calculate the volume of the full prism (without hole):**
The cross-section is a square with side 13 cm, so area is:
$$13 \times 13 = 169 \text{ cm}^2$$
Depth is 5 cm, so volume is:
$$V_{prism} = 169 \times 5 = 845 \text{ cm}^3$$
4. **Calculate the volume of the cylindrical hole:**
The hole is a cylinder with diameter 6 cm, so radius $r = \frac{6}{2} = 3$ cm.
The area of the circular cross-section is:
$$\pi r^2 = \pi \times 3^2 = 9\pi \text{ cm}^2$$
The depth is the same 5 cm, so volume of hole is:
$$V_{hole} = 9\pi \times 5 = 45\pi \text{ cm}^3$$
5. **Calculate the volume of the shape with hole:**
$$V = V_{prism} - V_{hole} = 845 - 45\pi$$
6. **Evaluate numerically:**
Using $\pi \approx 3.1416$,
$$45\pi \approx 45 \times 3.1416 = 141.372$$
So,
$$V \approx 845 - 141.372 = 703.628 \text{ cm}^3$$
7. **Round to 3 significant figures:**
$$\boxed{704 \text{ cm}^3}$$
This is the volume of the shape with the circular hole removed.
Volume With Hole 64704D
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