SSC CHSL 2023 PYQ — Question 56

The correct answer is option 1 i.e. 8800 cm³.

Given that

The height (h) and slant height (l) of a cone are 21 cm and 29 cm, respectively.

Slant height (l) = √(h²+ r²)

The volume of a cone is ⅓ 𝜋r²h cubic units

where r is the radius of a cone

⇒ 29 = √(21²+ r²)

⇒ r² = 29² - 21² = 841 - 441 = 400

⇒ r = 20 cm

Hence, Volume of a cone = ⅓ × (22/7) × 20² × 21 = 8800 cm³