A solid is in the shape of a frustum of a cone, The diameters of the two circular ends are 60 cm and 36 cm and the height is 9 cm. Find the area of its whole surface and the volume.

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Solution

The height of the frustum of a cone is h=9cm. The radii of the upper and lower circles of the frustum of the cone are r₁ =30cm and r₂ =18cm respectively.

The slant height of the frustum of the cone is

The volume of the frustum of the cone is

The total surface area of the frustum of the cone is

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A solid is in the shape of a frustum of a cone, The diameters of the two circular ends are 60 cm and 36 cm and the height is 9 cm. Find the area of its whole surface and the volume.

The height of the frustum of a cone is h=9cm. The radii of the upper and lower circles of the frustum of the cone are r1 =30cm and r2 =18cm respectively. The slant height of the frustum of the cone is The volume of the frustum of the cone is The total surface area of the frustum of the cone is