The diameters of the ends of a frustum of a cone are 32 cm and 20 cm. If its slant height is 10 cm, then its lateral surface area is

(a) 321 π cm²

(b) 300 π cm²

(c) 260 π cm²

(d) 250 π cm²

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Solution

Slant height = 10 cm

Total lateral surface area

= 260 $π {cm}^{2}$

Hence, the correct answer is choice (c).

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The diameters of the ends of a frustum of a cone are 32 cm and 20 cm. If its slant height is 10 cm, then its lateral surface area is (a) 321 π cm2 (b) 300 π cm2 (c) 260 π cm2 (d) 250 π cm2

Slant height = 10 cm Total lateral surface area = 260 π cm2 Hence, the correct answer is choice (c).

The diameters of the ends of a frustum of a cone are 32 cm and 20 cm. If its slant height is 10 cm, then its lateral surface area is

(a) 321 π cm²

(b) 300 π cm²

(c) 260 π cm²

(d) 250 π cm²

Slant height = 10 cm

Total lateral surface area

= 260 $π {cm}^{2}$

Hence, the correct answer is choice (c).