Question

radius and height of cylinder are 7m and 3m. find curved surface area of cylinder. answer fast and pls give me correct answers pls​

Answer 1

Answer:

440 sq m sheet of metal

Step-by-step explanation:

Given:

Radius r=7m, height =3m

We need to find the total surface area of a cylinder

 

=2πr(r+h)

=2×  

7

22

​  

×7(7+3)=440 sq meter

So, 440 sq m sheet of metal is required.

Answer 2

Given : Radius and height of cylinder are 7m and 3m .

To Find : Curved surface area of cylinder.

⠀⠀⠀⠀⠀⠀⠀⠀ ⠀⠀_______________

Here

$\:$

• Radius of the cylinder = 7m
• Height of the cylinder = 3m

$\: \:$

As we know that :

$\:$

$\underline{\boxed{\sf\purple{\bigstar \: C.S.A \: of \: a \: cylinder = 2\bold{\pi}rh}}}$

$\:$

Where

$\:$

• r denotes radius of the cylinder.
• h denotes height of the cylinder.

$\:$

Put the values and solve -

$\:$

$\sf:\implies \: C.S.A \: of \: the \: cylinder \: = 2\bold{\pi}rh \\ \\ \\ \sf:\implies \: C.S.A \: of \: the \: cylinder \: = 2 \times \frac{22}{7} \times 7 \times 3 \\ \\ \\ \sf:\implies \: C.S.A \: of \: the \: cylinder \: = 2 \times \frac{22}{\cancel{7}} \times \cancel7 \times 3 \\ \\ \\ \sf:\implies \: C.S.A \: of \: the \: cylinder \: = 2 \times 22 \times 3 \\ \\ \\ \sf:\implies \: C.S.A \: of \: the \: cylinder \: = \underline{\boxed{\sf\purple{132 {cm}^{2} }}}\bigstar \\ \\ \\ \\ \\ \sf\therefore{\underline{Hence, \: the \: C.S.A\: of \: the \: cylinder \:is \: \bold{132 {cm}^{2}} }}$