Question

Find the curved surface area of a cylinder with radius of base 7 cm and height 9.5 cm. (Use ∏=22/7)

• A. 420 cm²
• B. 430 cm²
• C. 428 cm²
• D. 418 cm²

Answer 1

Answer:

D. 418 cm²

Curved Surface Area (CSA) of a cylinder is given by:

$\text{CSA} = 2\pi rh$

Substitute the values:
$= 2 \times \frac{22}{7} \times 7 \times 9.5$
Simplify step by step:

• $( \frac{22}{7} \times 7 = 22 )$

$= 2 \times 22 \times 9.5$
$= 44 \times 9.5$
$= 418$

Final Answer: 418 cm²