What is the height of the right circular cone?
height=12 cm
slant height= 9cm
diameter = 11 cm
5 answers
The height of the right circular cone is 12 cm.
Find the surface area of the cylinder below. Use approximation 3.14 for pi.
Radius = 5 cm
Height = 15 cm
A. 628 centimeters
B. 533.8 square centimeters
C. 628 square centimeters
D. 1,099 square centimeters
Radius = 5 cm
Height = 15 cm
A. 628 centimeters
B. 533.8 square centimeters
C. 628 square centimeters
D. 1,099 square centimeters
To find the surface area of a cylinder, we need to find the area of the two circular bases and the lateral surface area.
The area of a circular base is given by the formula: A_base = π * r^2, where π is approximately 3.14 and r is the radius.
A_base = 3.14 * 5^2 = 3.14 * 25 = 78.5 square centimeters (approximately)
The lateral surface area of a cylinder is given by the formula: A_lateral = 2 * π * r * h, where π is approximately 3.14, r is the radius, and h is the height.
A_lateral = 2 * 3.14 * 5 * 15 = 3.14 * 75 = 235.5 square centimeters (approximately)
The total surface area of the cylinder is the sum of the base areas and the lateral surface area: A_total = A_base + A_base + A_lateral = 78.5 + 78.5 + 235.5 = 392.5 square centimeters (approximately)
Therefore, the surface area of the cylinder is approximately 392.5 square centimeters.
None of the given answer choices match the correct answer.
The area of a circular base is given by the formula: A_base = π * r^2, where π is approximately 3.14 and r is the radius.
A_base = 3.14 * 5^2 = 3.14 * 25 = 78.5 square centimeters (approximately)
The lateral surface area of a cylinder is given by the formula: A_lateral = 2 * π * r * h, where π is approximately 3.14, r is the radius, and h is the height.
A_lateral = 2 * 3.14 * 5 * 15 = 3.14 * 75 = 235.5 square centimeters (approximately)
The total surface area of the cylinder is the sum of the base areas and the lateral surface area: A_total = A_base + A_base + A_lateral = 78.5 + 78.5 + 235.5 = 392.5 square centimeters (approximately)
Therefore, the surface area of the cylinder is approximately 392.5 square centimeters.
None of the given answer choices match the correct answer.
Just choose one
If I have to choose one of the given answer choices, I would choose option B. 533.8 square centimeters.
1 answer