Question

if the diameter of the cylinder is 28 centimetre and its height is 20 CM then find its curved surface area​

Answer 1

Given

Diameter of cylinder = 28 cm.

Height of cylinder = 20 cm

To find

Curved surface area of cylinder

Solution

Here, diameter of cylinder = 28 cm.

⟿ Radius = Diameter/2

⟿ Radius = 28/2

⟿ Radius = 14 cm.

We know that,

➥ CSA of cylinder = 2πrh

Putting values we get :

⟼ CSA of cylinder = 2 × 22/7 × 14 × 20

⟼ CSA of cylinder = 2 × 22 × 2 × 20

⟼ CSA of cylinder = 4 × 440

⟼ CSA of cylinder = 1760 cm²

Therefore,

Curved surface area of cylinder = 1760 cm² .

___________________________________

More formulas regarding cylinder :

⤇ Volume of cylinder = πr²h

⤇ TSA of cylinder = 2πr(r + h)

Answer 2

Answer:

Given =Diameter =28

height. = 20

find = curved surface area ?

Step-by-step explanation:

d /2 = r

28 /2 = 14

r= 14

curved surface area of cylinder =2πrh

2×22/7 ×14 ×20

1760 cm