Question

find the curved surface area of a cylinder of radius 21 cm and height 28cm ​

Answer 1

Answer:

Hope the above answer helps you

Answer 2

The curved surface area of a cylinder $=3696 cm^{2}$

Step-by-step explanation:

Given,

The radius of the cylinder (r) = 21 m and

The height of the cylinder (h) = 28 m

To find, the curved surface area of a cylinder = ?

We know that,

The curved surface area of a cylinder = $2\pi rh$

$=2\times \dfrac{22}{7}\times 21\times 28 cm^{2}$

$=2\times 22\times 3\times 28 cm^{2}$

$=44\times 84 cm^{2}$

$=3696 cm^{2}$

Thus, the curved surface area of a cylinder $=3696 cm^{2}$