SarkariPYQ

SSC GD 2023 PYQ — Question 51

SSC GD Constable (English) - 25 Jan 2023 - Shift 1 • Quantitative Aptitude • Q51

Back to paper

The diameter of the base of a right circular cylinder is 56 cm, and its height is 18 cm. The area of the curved surface of the cylinder is:

(Use π\pi=227\frac{22}{7} )

Show answer & explanation

Correct answer: D

Explanation

The correct answer is option 4 i.e. 3168 sq cm

Given that

The diameter (D) of the base of a right circular cylinder is 56 cm

The radius (r) = D/2 = 56/2 = 28 cm

Its height (h) is 18 cm

Formula used

The area of the curved surface is 2πr × h

Calculation

Area = 2 × 22/7 × 28 × 18 = 44 × 72 = 3168 cm2