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genyjoannerubiera
26.06.2019 •
Mathematics
The figure is made up of a cylinder, a cone, and a half sphere. the radius of the half sphere is 3 inches. what is the volume of the composite figure?
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Ответ:
The volume of the composite figure is 84π ≅ 263.89 inches³
Step-by-step explanation:
Lets revise the rules of the volume of some figures
- The composite figure consists of :
# Half sphere with radius 3 inches
# Cylinder with radius 3 inches and height 6 inches
# Cone with radius 3 inches and height 4 inches
- The volume of the sphere is 4/3 π r³
∴ The volume of the half sphere = 1/2 × 4/3 π r³ = 2/3 π r³
- The volume of the cylinder is π r² h
- The volume of the cone is 1/3 π r² h
* Now lets solve the problem
- The volume of the half sphere
∵ The radius of the half sphere = 3 inches
∵ The volume of it = 2/3 π r³
∴ The volume = 2/3 × π × (3)³ = 18π inches³
- The volume of the cylinder
∵ The radius of the cylinder = 3 inches
∵ The height of the cylinder = 6 inches
∵ The volume of it = π r² h
∴ Its volume = π × (3)² × 6 = 54π inches³
- The volume of the cone
∵ The radius of the cone = 3 inches
∵ The height of the cone = 4 inches
∵ The volume of it = 1/3 π r² h
∴ Its volume = 1/3 π × (3)² × 4 = 12π inches³
- Add all the volumes to find the volume of the composite figure
∴ The volume = 18π + 54π + 12π = 84π = 263.89 inches³
* The volume of the composite figure is 84π ≅ 263.89 inches³
Ответ:
Step-by-step explanation:
i just did this on edge