Slant height of the cone is 25 cm. Diameter of the cone is 3/2 times t...
Let x be the height of the cone.
∴ Diameter = 3x/2
∴ Radius = 3x/4
So we get,
252 = x2 + (3x/4)2
∴ x = 20 cm
∴ Radius of the cone = (3 x 20)/4 = 15 cm
Volume of the cone = (1/3) x π x 152 x 20 = 1500π cm3
Hence, option 1.
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Slant height of the cone is 25 cm. Diameter of the cone is 3/2 times t...
Let x be the height of the cone.
∴ Diameter = 3x/2
∴ Radius = 3x/4
So we get,
252 = x2 + (3x/4)2
∴ x = 20 cm
∴ Radius of the cone = (3 x 20)/4 = 15 cm
Volume of the cone = (1/3) x π x 152 x 20 = 1500π cm3
Hence, option 1.
Slant height of the cone is 25 cm. Diameter of the cone is 3/2 times t...
Given information:
- Slant height of the cone = 25 cm
- Diameter of the cone = 3/2 times the height of the cone
To find: Volume of the cone
Let's solve the problem step by step.
Step 1: Finding the height of the cone
We know that the diameter of the cone is 3/2 times the height of the cone.
Let's assume the height of the cone as h.
So, the diameter = (3/2)h
Radius = (1/2) * diameter = (1/2) * (3/2)h = (3/4)h
We can use the Pythagorean theorem to find the slant height of the cone.
Slant height (l) = √(r^2 + h^2)
Given that slant height (l) = 25 cm
Substituting the values, we get:
25 = √((3/4h)^2 + h^2)
625 = (9/16)h^2 + h^2
625 = (25/16)h^2
h^2 = (625 * 16) / 25
h^2 = 400
h = √400
h = 20 cm
So, the height of the cone is 20 cm.
Step 2: Finding the volume of the cone
The volume of a cone can be calculated using the formula:
Volume = (1/3) * π * r^2 * h
where r is the radius and h is the height.
We already know the height of the cone, which is 20 cm.
Substituting the values, we get:
Volume = (1/3) * π * (3/4h)^2 * h
= (1/3) * π * (9/16 * 20)^2 * 20
= (1/3) * π * 9/16 * 20 * 20
= (1/3) * π * 9 * 25
= (3/3) * π * 9 * 25
= 3π * 9 * 25
= 675π
Approximating π as 22/7, we get:
Volume ≈ 675 * 22/7
≈ 1500
Therefore, the volume of the cone is approximately 1500 cm^3.