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A right triangle with sides 3cm, 4cm and 5cm is rotated about the side of 3cm to form a cone. The volume of the cone so formed is?
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A right triangle with sides 3cm, 4cm and 5cm is rotated about the side...
Understanding the Cone Formation
When the right triangle with sides 3 cm, 4 cm, and 5 cm is rotated about the 3 cm side, a cone is formed. In this case, the 3 cm side becomes the height of the cone, while the 4 cm side becomes the radius.
Identifying the Parameters
- Height (h) of the cone = 3 cm
- Radius (r) of the cone = 4 cm
Volume of the Cone
The volume (V) of a cone can be calculated using the formula:
V = (1/3) * π * r² * h
- Here, π (pi) is approximately 3.14.
- Substitute the values:
- r = 4 cm
- h = 3 cm
Calculating the Volume
1. Calculate r²:
- r² = 4 cm * 4 cm = 16 cm²
2. Substitute into the volume formula:
- V = (1/3) * π * 16 cm² * 3 cm
3. Simplify:
- V = (1/3) * 3.14 * 16 cm² * 3 cm
- V = (1/3) * 3.14 * 48 cm³
- V = 50.24 cm³ (approximately)
Final Result
The volume of the cone formed by rotating the right triangle around the 3 cm side is approximately 50.24 cm³.
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A right triangle with sides 3cm, 4cm and 5cm is rotated about the side of 3cm to form a cone. The volume of the cone so formed is?
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