a circular disc of radius 12 cm is cut into three equal parts and three cones are made by bending each part.
what is the radius of each cone?
find curved surface area of cone?.
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Radius of each cone = 4 cm , curved surface area of each cone = 150.7 cm²
Step-by-step explanation:
a circular disc of radius 12 cm is cut into three equal parts
Circumference of circular disc = 2 * π * 12
= 24 π cm
Cut into three parts
Arc length of each segment = 24 π/3 = 8 π cm
Now this arc length will become circumference of base of cone
& radius of circular disc will become slant height of cone
Slant height of cone = 12 cm
Circumference of base of cone = 2 π * Radius of cone
2 π * Radius of cone = 8 π
=> Radius of cone = 4 cm
curved surface area of cone = π * 4 * 12 = 48π cm²
= 150.7 cm²
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