Question

What would be the curved surface area of a cylinder whose radius is 5 cm, and its height is 9 cm?

• A. 80π ${\text{cm}}^2$
• B. 90π ${\text{cm}}^2$
• C. 82π ${\text{cm}}^2$
• D. 92π ${\text{cm}}^2$

Answer 1

The correct option is B 90π ${\text{cm}}^2$

Radius of the cylinder (r) = 5 cm
Height of the cylinder (h) = 9 cm

Curved surface area of the cylinder
= $2\pi rh$
= $2\pi \times 5\times 9$
= $90\pi sqcm$