Question

If radius of a cylinder is 7 cm and height is 12 cm find curved surface area

options:
1.) 528 cu .cm
2.) 528 sq .cm
3.) 44 sq .cm
4.) 488 sq .cm

please choose correct answer if you answer correctly I mark you brainleist​

Answer 1

Answer:

Given,

radius(r) of a cylinder = 7 cm

height(h) of a cylinder = 12 cm

By formula,

Curved Surface Area (C.S.A) = 2πrh

= 2 × 22/7 × 7 × 12 sq. cm

= 2 × 22 × 12 sq. cm

= 528 sq. cm

Answer :- The curved surface area is 528 sq. cm

Answer 2

Answer :

• 1) 528 sq.cm

Given :

• Radius of the cylinder = 7 cm
• Height of the cylinder = 12 cm

To find :

• the curved surface area

Solution :

⇒ Let's find the curved surface area of the cylinder by using the following formula :

→ Curved surface area = 2πrh

→ Curved surface area = 2 × π × r × h

• Putting the values,

$\tt { \rightarrow Curved \: surface \: area = 2 \times \dfrac{22}{7} \times 7 \times 12 }$

$\tt { \rightarrow Curved \: surface \: area = 2 \times \dfrac{22}{7} \times 84 }$

$\tt { \rightarrow Curved \: surface \: area = \dfrac{22}{7} \times 168 }$

$\tt { \rightarrow Curved \: surface \: area = \dfrac{22 \times 168}{7} }$

$\tt { \rightarrow Curved \: surface \: area = \dfrac{3696}{7} }$

$\tt { \rightarrow Curved \: surface \: area = 528}$

• Therefore, the curved surface area of the cylinder is 528 sq.cm.

⇒ Know more~

• Curved surface area of a cylinder to be expressed in sq units.