# 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 - Mathematics

MCQ

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

• 321 π cm2

• 300 π cm2

• 260 π cm2

• 250 π cm2

#### Solution

r_1 = 32/2

= 16 "cm"

r_2 = 20/2

 = 10 cm

Slant height = 10 cm

Total lateral surface area

= pi(r_1 +r_2) l

=pi (16 + 10 )10
= 260 $\pi {cm}^2$

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#### APPEARS IN

RD Sharma Class 10 Maths
Chapter 14 Surface Areas and Volumes
Q 36 | Page 90