The radius of the base of cone is 3 cm and height is 4 cm. Find the volume of the cone?
Correct answer: A. 12 π cm3
- A. 12 π cm3
- B. 6 π cm3
- C. 8 π cm3
- D. 10 π cm3
Explanation
Using V = 1/3πr²h, the volume is 1/3 × π × (3 cm)² × 4 cm = 1/3 × π × 9 cm² × 4 cm = 12π cm³. The likely wrong choice is 8π cm³, which can result from using an incorrect cone formula or mishandling the radius.
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About Area and Volume
Area measures the surface enclosed by two-dimensional figures, while volume measures the space occupied by three-dimensional solids. Problems use formulas for rectangles, triangles, circles, prisms, cylinders, cones, spheres, and composite figures, including unit conversion and the distinction between surface area, lateral area, and volume.
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