If the height of a solid right circular cylinder is 27 cm and the diameter of its base is 30 cm, the total surface area (in cm²) of the right circular cylinder is:
Take pi = 22/7
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 3960
The total surface area of a cylinder = 2πr(r + h) where r and h are the radius and height respectively.
Diameter of the cylinder = 30 cm
Radius (r) = 30/2 = 15 cm
Height of the cylinder (h) = 27 cm
The total surface area = 2π(15)(15 + 27)
= 2 × (22/7) × 15 × 42
= 3960 cm2
Therefore, the total surface area of the right circular cylinder is 3960 cm2.