The circumference of the base of a right circular cone is…

The circumference of the base of a right circular cone is 44 cm and its height is 24 cm. The curved surface area (in cm²) of the cone is:

(Take π = $\frac{22}{7}$ )

Show answer & explanation

Correct answer: C

Explanation

The correct answer is option 3 i.e. 550.

Circumference of the base = 2πr = 44 cm.

r = 7 cm.

slant height = $\sqrt{7^2 + 24^2}$ = 25 cm.

CSA of cone = πrl = 22/7 × 7 × 25 = 550 cm².

SSC CGL 2020 PYQ — Question 97