The radius of the cylinder base is 8cm. The area of the lateral surface of the cylinder is half the area
June 2, 2021 | education
| The radius of the cylinder base is 8cm. The area of the lateral surface of the cylinder is half the area of the base. Find the volume of a cylinder
Since the radius of the base of the cylinder is 8 cm, the area of the base is:
S = π * r² = 64 * π (cm²).
As you know, the area of the lateral surface of the cylinder is equal to:
S = 2 * π * r * h.
This means that the lateral surface area of this cylinder is equal to:
S = 2 * π * 8 * h
S = 16 * π * h (cm²).
By the condition of the problem, we get:
2 * 16 * π * h = 64 * π,
32 * π * h = 64 * π,
h = 2 (cm).
The volume of the cylinder is: V = π * r² * h.
V = π * 64 * 2 = 128 * π (cm³).
Answer: V = 128 * π cm³.
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