Question

Find the curved surface area of a frustum cone whose larger and smaller radius is 35 and 10 m. The slant height is 45 m. (Use $\pi$ = 3)

• A. 6,375 m${}^2$
• B. 6,275 m${}^2$
• C. 6,075 m${}^2$
• D. 6,175 m${}^2$

Answer 1

Answer: (C)

6,075 m${}^2$

Curved surface area of a frustum cone = $\pi$(r + R)s $\Rightarrow$ ?

= 3 $\times$ (35 + 10) $\times$45

= 3 $\times$ (45) $\times$ 45

Curved surface area of a frustum cone = 6,075 m${}^2$