Question

The diameter of a cylinder is 28 cm and height is 40 cm. Find the curved surface area of
the cylinder.
​

Answer 1

AnswEr :

Curved surface area of the cylinder is 3520 cm².

Step-by-step explanation :

GivEn :

We are given with the Diameter of a cylinder as 28cm.

Also, We know that,

➝ Radius = diameter/2

➝ 28/2

➝ 14cm

Height of a cylinder = 40cm

To find :

• Curved surface area of the cylinder = ?

SoluTion :

We know that

$\star \: \large\boxed{ \sf{Curved \: surface \: area = 2 \pi rh}}$

Substituting the values,

➟ CSA = 2 × (22/7) × 14 × 40

➟ CSA = 22/7 × 1120

➟ CSA = 24640/7

➟ CSA = 3520 cm²

Hence, Curved surface area of the cylinder is 3520 cm².

Additional information :

• CSA/LSA = 2π × r × h

• Area of the circular bases of cylinder = 2 (πr²)

• TSA = 2π × r × h + 2πr²= 2πr (h + r)

Answer 2

Given :-

• Diameter of a cylinder is 28cm.
• Height of a cylinder is 40cm.

To Find :-

• The curved surface area of the cylinder.

Solution :-

Given that, Diameter = 28cm.

↪ Radius = Diameter/2

↪Radius = 28/2

↪ Radius = 14cm.

As we know that,

${\large{ \boxed{ \red{ \tt{Curved \: surface \: area \: of \: cylinder = 2πrh}}}}}$

[ Putting values ]

↪ CSA of cylinder =2 × 3.14 × 14 × 40

↪ CSA of cylinder = 6.28 × 560

↪ CSA of cylinder = 3516.8cm².

Hence,

• The curved surface area of cylinder is 3516.8cm².