Question

if the diameter of a cylinder is 26 cm and height is 20 cm then find its curved surface area .
EXPLANATION ALSO PLEASE ITS URGENT ​

Answer 1

• Curved surface area of cylinder is 1634.28 $\sf {cm}^{2}$.

Step-by-step explanation:

Given:-

• Diameter of cylinder is 26 cm.
• Height of cylinder is 20 cm.

To find:-

• Curved surface area of cylinder.

Solution:-

We know that,

$\boxed{ \sf \bold { \star \:Curved \: surface \: area \: of \: cylinder = 2\pi rh}}$

In which,

• r and h are radius of cylinder and height of cylinder respectively.

r = 26/2 = 13 cm.

h = 20 cm.

Put the values in formula :

$\longrightarrow \sf 2 \times \cfrac{22}{7} \times 13 \times 20$

$\longrightarrow \sf \cfrac{11440}{7}$

$\longrightarrow \sf 1634.28$

Therefore,

Curved surface area of cylinder is 1634.28 $\sf {cm}^{2}$.

Answer 2

Diameter = 2* radius

D=26 cm(given)

r= D/2= 26/2=13 cm

height=h=20cm(given)

curved surface area = 2πrh= 2*(22/7)*13*20= 11440/7= 1634.28=1634.3 cm² ( here π=22/7)