Question

Can y’all please help me answer these questions

Answer 1

Step-by-step explanation:

4.

⇒ $V = \pi r^{2}h$

⇒ $V = \pi(10)^{2}(40)$

⇒ $V = 4000\pi$

⇒ $V = 12566.4cm^{3}$

5.

⇒ $V = \frac{1}{3}\pi r^{2}h$

⇒ $V = \frac{1}{3}\pi (8)^{2}(h)$

As we know the radius and slant height, we can use Pythagoras' Theorem to find the perpendicular height.

⇒ $a^{2} + b^{2} = c^{2}$

⇒ $(8)^{2} + h^{2} = 20^{2}$

⇒ $h = \sqrt{20^{2} - 8^{2}}$

⇒ $h = 4\sqrt{21}$

Now substitute this into the volume formula.

⇒ $V = \frac{1}{3}\pi (8)^{2}(4\sqrt{21})$

⇒ $V = \frac{256\sqrt{21} }{3}\pi$

⇒ $V = 1228.5mm^{3}$

6.

⇒ $V = l^{3}$

⇒ $V = (3.1)^{3}$

⇒ $V = 29.8inches^{3}$

7.

⇒ $V = \frac{1}{3}lwh$

⇒ $V = \frac{1}{3}(12)(4)(6)$

⇒ $V = 96inches^{3}$

Answer 2

Answer : 4. 12571.429.

5. 4022.857

6. 29.791

7. 96

Step-by-step explanation:

4. FORMULA: PIE R SQUARE TIMES HEIGHT

5. FORMULA: the same as the previous formula

6. FORMULA: LENTH × WIDTH × HEIGHT

7. FORMULA: 1/3 × L × W × H

4. 22/7×10×10×40 = 12571.429

5. 22/7×8×8×20 = 4022.857

6. 3.1 × 3.1 × 3.1 = 29.791

7. 1/3 × 12 × 4 × 6 = 96

HOPE THIS HELPS U