Find Total Surface Area When Diameter of Cone is 14cm with Total Height 20cm
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2
Answer:
diameter = 14 cm, then radius = 7 cm
The surface area of a cylinder can be divided into 2 circles and a rectangle. The curved surface is the rectangle.
Height of rectangle = height of cylinder = 20cm
Width of rectangle = circumference of circle = 2πr = 2π(7cm) = 14π cm²
Curved surface area
Area of rectangle = width * Height = 20 cm * 14π cm = 280π cm² = 879.64594301 cm²
Total surface area
As I said before, 2 circles and a square.
Area of circles = 2πr² = 2π(7 cm)² = 98π cm²
Total = 280π cm² + 98π cm² = 1187.5220231 cm²
Step-by-step explanation:
Answered by
11
Answer:
Diameter = 14 cm, then radius = 7 cm
The surface area of a cylinder can be divided into 2 circles and a rectangle. The curved surface is the rectangle.
Height of rectangle = height of cylinder = 20cm
Width of rectangle = circumference of circle = 2πr = 2π(7cm) = 14π cm²
Curved surface area
Area of rectangle = width * Height = 20 cm * 14π cm = 280π cm² = 879.64594301 cm²
Total surface area
As I said before, 2 circles and a square.
Area of circles = 2πr² = 2π(7 cm)² = 98π cm²
Total = 280π cm² + 98π cm² = 1187.5220231 cm²
Step-by-step explanation:
hope it's help you (θ‿θ)
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