Question

find the lateral surface area of a cylinder which radius is 21 cm and height is 45cm ​

Answer 1

Step-by-step explanation:

given that :

radius = 21cm.

height = 45cm

then according to questions-

lateral surface area of cylinder = 2πrh

= 2 × 22/7 × 21 × 45

= 41580/7

= 5940cm

here is your solution ✌️

Answer 2

Answer:

• CSA of cylinder = 5934.6 cm²

Step-by-step explanation:

Given:

• Radius of cylinder = 21 cm
• Height of cylinder = 45 cm

To Find:

• CSA of cylinder

Now, we know that,

⇒ CSA of cylinder = 2πrh

⇒ CSA of cylinder = 2 × 3.14 × 21 × 45

⇒ CSA of cylinder = 6.28 × 945

⇒ CSA of cylinder = 5934.6 cm²

Hence, CSA of cylinder = 5934.6 cm²

Extra Info:

⇒ TSA of cylinder = 2πr(h+r)

⇒ LSA of cylinder = 2πrh

⇒ Volume of Cylinder = πr²h