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Key Concept Quiz 8.4
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1
A chocolate kiss was made in the shape of a cone with a radius of 1.5 cm and a slant height of 2.1 cm. Find the lateral surface area of the kiss.
A)5.0 cm2
B)7.0 cm2
C)9.9 cm2
D)13.9 cm2
2
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Neela won the part of Maid Marian in the school stage production of Robin Hood. She made a tall conical hat with a diameter of 28 cm and a height of 48 cm for her role. Find the area of cardboard needed for the hat.
A)2111.2 cm2
B)2199.1 cm2
C)4222.3 cm2
D)4398.2 cm2
3
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Annika made a cone to support a yard light. She made the sides and the bottom. The radius of the cone was 25 cm, and the height was 60 cm. Find the area of plastic required to make the cone.
A)7068.6 cm2
B)5105.1 cm2
C)3534.3 cm2
D)2557.6 cm2
4
The cone in question#4 was wrapped in gift wrap as a birthday present. One sheet of gift wrap covers 500 cm2. How many sheets are required?
A)7
B)8
C)14
D)15
5
Paul wants to make a cone with a lateral surface area of 2000 cm2, such that the slant height equals twice the radius. Find the radius of such a cone.
A)25.2 cm
B)17.8 cm
C)15.6 cm
D)12.6 cm







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