SSC CHSL 2023 PYQ — Question 61

The correct answer is option 3 i.e. 2715.43 m².

Given that.

Radius (r) + Height (h) = 42 m

The total surface area of the cylinder is 6336 m²,

Total surface area of cylinder = 2πr(r + h)

Curved surface area (CSA) of cylinder = 2πrh sq. units

⇒ 2πr(r + h) = 6336

⇒ 2 × $\frac{22}{7}$ × r × 42 = 6336

⇒ r = 24 m

So, h = 42 - 24 = 18 m

Hence, CSA of cylinder = 2 × $\frac{22}{7}$ × 24 × 18 = 2715.43 m²