What is the volume of the cone in cubic centimeters? Round your answer to the nearest tenth. L=9 D=5

Answer 1

To calculate the volume of a cone, you need to use the formula:

Volume = (1/3) × π × r² × h

Where:
r = radius of the base (which is half the diameter, so r = D/2)
h = height of the cone

Given:
L = 9
D = 5

We can find h using the Pythagorean theorem, since the height is the slant height of the cone:

L² = r² + h²
9² = (5/2)² + h²
81 = 25/4 + h²
81 - 25/4 = h²
4(81) - 25 = 4h²
324 - 25 = 4h²
299 = 4h²
h² = 299/4
h = √(299/4)

Now, we can find the radius (r) using the given diameter:

r = D/2
r = 5/2

Next, we can calculate the volume:

Volume = (1/3) × π × r² × h
Volume = (1/3) × 3.14 × (5/2)² × √(299/4)

Now let's calculate the final answer by rounding it to the nearest tenth:

Volume ≈ (1/3) × 3.14 × (2.5)² × √(299/4)
Volume ≈ 0.333 × 3.14 × 6.25 × √(299/4)
Volume ≈ 2.07 × 6.25 × √(299/4)
Volume ≈ 12.94 × √(299/4)
Volume ≈ 12.94 × √(299/4)
Volume ≈ 12.94 × (17.282/2)
Volume ≈ 12.94 × 8.641
Volume ≈ 111.692 cubic centimeters

Therefore, the volume of the cone is approximately 111.7 cubic centimeters.

Answer 2

is this right

Answer 3

I apologize for any confusion caused. Upon rechecking the calculations, there seems to be an error in the calculation of the height. Let's recalculate the volume of the cone.

Given:
L = 9
D = 5

First, let's find the radius (r) using the given diameter:

r = D/2
r = 5/2
r = 2.5

Now, we can calculate the volume:

Volume = (1/3) × π × r² × h

Since the slant height (L) is given, we need to use the Pythagorean theorem to find the height (h):

L² = r² + h²
9² = 2.5² + h²
81 = 6.25 + h²
h² = 81 - 6.25
h² = 74.75
h = √74.75
h ≈ 8.65 (rounded to the nearest hundredth)

Now, substituting the values into the formula:

Volume = (1/3) × 3.14 × (2.5)² × 8.65
Volume ≈ 0.333 × 3.14 × 6.25 × 8.65
Volume ≈ 0.333 × 3.14 × 54.69
Volume ≈ 57.6 cubic centimeters (rounded to the nearest tenth)

Therefore, the volume of the cone is approximately 57.6 cubic centimeters.