Question

Radii of the ends of a frustum of a cone 45 cm high are 28 cm and 7cm. Find its volume, the curved surface area and the total surface area .​

Answer 1

Answer:

Step-by-step explanation:

LET ‘r’ and ‘R’ be the radii of the bottom and top circular ends of a frustum of a cone, respectively and ‘h’ be the height of the cone.

=> volume of the frustum of the cone

=>1/3πh(R²+r²+Rr)

Now,

curved surface area of the frustum of the cone.

Total surface area of the frustum of the cone

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