The radius of a right circular cylinder is 7 cm. Its height is twice its radius. What is the curved surface area of the cylinder? (Take $π =\frac{22}{7}$)
Answer & explanation
Correct answer: option 3
We know that,
The curved surface area of the cylinder = 2πrh
The radius of a right circular cylinder = 7 cm
Height = 2 × radius = 2 × 7 = 14 cm
The curved surface area of the cylinder = 2 × \(\frac{22}{7}\) × 7 × 14 = 616 cm2