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.