Asked by Naseer Ibrahim
A sector of a circle radius 8cm subtends and and angle 90°a at the centre of a circle. If the sector is folded without overlap to form the curved surface of a cone, find the 1. Base radius 2. Height 3. Volume of the cone.
Answers
Answered by
oobleck
s = rθ so the circumference of the base of the cone is 8*π/2 = 4π
Thus the radius of the base is 4π/2π = 2 (1/4 the radius of the original circle)
The slant height is the original circle radius.
so the height of the cone is √(8^2-2^2) = √60
as always, the volume v = 1/3 πr^2 h
Thus the radius of the base is 4π/2π = 2 (1/4 the radius of the original circle)
The slant height is the original circle radius.
so the height of the cone is √(8^2-2^2) = √60
as always, the volume v = 1/3 πr^2 h
Answered by
ohunoluwa
I don't like ur answer
it's not well explanatory
it's not well explanatory
Answered by
dami
It is not well explanatory
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