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For a frustum, the curved surface area is πl(R + r). What does the full total surface area additionally include?

Class 10Frustum of a ConeMensuration

Aπ* $R^{2}$ + π* $r^{2}$ (both circular ends)
Bonly π* $R^{2}$ (bottom end)
C2*π*R*h (a cylindrical band)
D(1/3)*π*h (a fraction of the cone)

Step-by-Step Solution

TSA = curved surface area + area of both circular ends = π*l*

(R + r) +

π*

R^{2}

+ π*

r^{2}

.

Answer: A) π*

R^{2}

+ π*

r^{2}

(both circular ends)

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