A sector of angle 108⁰ is cut from a circle of radius 20 cm. It is folded to form a cone. Calculate: (a) The curved surface area...

      

A sector of angle 108⁰ is cut from a circle of radius 20 cm. It is folded to form a cone.
Calculate:
(a) The curved surface area of the cone.
(b) The base radius of the cone.
(c) The vertical height of the cone.
(d) If 12 cm of the cone is chopped off to form a frustrum as shown below.

Calculate the volume of the frustum formed.

  

Answers

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Kavungya answered the question on November 13, 2019 at 11:08

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