The volume of a cylinder having base radius 3 cm is 396 cm3. Find its curved surface area (in cm2). (Use $\pi =\frac{22}{7}$)
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → 264
Given,
Radius of the cylinder = 3 cm
Volume of the cylinder = 396 cm3
We know that,
Volume of the cylinder = ∏r2h
∏r2h = 396
\(\frac{22}{7}\) × 32 × h = 396
h = 14
Now the curved surface area of the cylinder = 2∏rh
2 × \(\frac{22}{7}\) × 3 × 14 = 264 cm2