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Keith_Richards [23]
2 years ago
12

The diagram shows a plastic solid made by joining a hemisphere to a cone. The radius of the hemisphere is 5cm and the height of

the cone is 12cm.
i) Calculate the volume of the solid.

ii) Calculate the total surface area of the solid.

Mathematics
1 answer:
lilavasa [31]2 years ago
7 0

Answer:

575.8 cubic cm

Step-by-step explanation:

V(cone) = 1/3· π · r² · h

V = 1/3 · π · 25 · 12

V = 4(25)π or 100π = 314

V(half-sphere) = (4/3 · π r³)/2

V = (4/3π · 125) = 261.8

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