SSC CPO 2023 PYQ — Question 143

The correct answer is option 4 i.e.  $\frac{528}{7}$ cm²

Given that

The radius of a cone (r) = 3 cm

The height of a cone (h) = 4 cm

Formula used

Total surface area of a cone TSA = πr(r + l)

slant height (l) = √(3² + 4²) = √(9 + 16) = √25 = 5 cm

Calculation 

TSA = (22/7) × 3 × (3 + 5)

TSA =   $\frac{528}{7}$ cm²