Question

(b) find the area of the curred surface
and the total surface of a right circular cylinder whose
height
and radius of the
base are 20 cm and 14 cm respectively

​

Answer 1

Answer:

420is the ans

Step-by-step explanation:

½×20×14=420

Answer 2

Answer :

• curved surface area of cylinder is 1760 cm
• Total surface area of cylinder is 2992 cm

Given :

• Height is 20cm
• Radius is 14cm

To find :

• curved surface area of cylinder
• Total surface area of cylinder

Solution :

Given,

• Height of cylinder is 20cm
• Radius of cylinder is 14cm

As we know that ,

• curved surface area of cylinder = 2πrh

⟶ 2 × 22/7 × 14 × 20

⟶ 2 × 22 × 2 × 20

⟶ 2 × 44 × 20

⟶ 1760 cm

Curved surface area of cylinder is 1760 cm

As we know that,

• Total surface area of cylinder = 2πr(r + h)

⟶ 2 × 22/7 × 14 (14 + 20)

⟶ 2 × 22 × 2 (34)

⟶ 2992 cm

Total surface area of cylinder is 2992 cm

Hence ,

• curved surface area of cylinder is 1760 cm
• Total surface area of cylinder is 2992 cm