Question

Can y’all please help me answer these questions

Answer 1

Answer : 4. 12571.429.

5. 4022.857

6. 29.791

7. 96

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

Answer 2

Explanation:

4.

⇒
`V = \pi r^(2)h`

⇒
`V = \pi(10)^(2)(40)`

⇒
`V = 4000\pi`

⇒
`V = 12566.4cm^(3)`

5.

⇒
`V = (1)/(3)\pi r^(2)h`

⇒
`V = (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√(21)`

Now substitute this into the volume formula.

⇒
`V = (1)/(3)\pi (8)^(2)(4√(21))`

⇒
`V = (256√(21) )/(3)\pi`

⇒
`V = 1228.5mm^(3)`

6.

⇒
`V = l^(3)`

⇒
`V = (3.1)^(3)`

⇒
`V = 29.8inches^(3)`

7.

⇒
`V = (1)/(3)lwh`

⇒
`V = (1)/(3)(12)(4)(6)`

⇒
`V = 96inches^(3)`