SSC CPO 2024 PYQ — Question 150

The correct answer is option 4 i.e. 1 units.

Given that, slant height, l = 4.2 units

Lateral surface area, LSA = 13.2 units² 

LSA of cone = $\pi rl$

According to the given question,

LSA = 13.2

⇒ $\pi rl$ = 13.2

⇒ ${22 \over 7} \times r \times 4.2$ = 13.2

⇒ r = 1 unit

Hence the radius of the base of the cone is 1 unit.