Question

. Find the curved surface area and the total surface
area of a right circular cylinder whose height is 18 cm
and radius of the base is 7 cm.​

Answer 1

Answer:

Right cylinder

Solve for 

surface area

A

≈

1099.56

cm²

r Radius

=7cm

h Height

=18

cm

Answer 2

Answer:

• Curved surface area of cylinder = 792 cm²
• Total surface area of cylinder = 1100 cm²

Step-by-step explanation:

Given:

• Height of cylinder = 18 cm
• Radius of the base of the cylinder = 7 cm

To Find:

• Curved surface area cylinder.
• Total surface area of cylinder.

Now, we know that

⇒ Curved surface area of cylinder = 2πrh

Now, put the values in the formula,

⇒ Curved surface area of cylinder = 2πrh

⇒ Curved surface area of cylinder = 2 × 22/7 × 7 × 18

⇒ Curved surface area of cylinder = 2 × 22 × 18

⇒ Curved surface area of cylinder = 792 cm²

Now, we also know that

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

⇒ Total surface area of cylinder = 2 × 22/7 × 7(7 + 18)

⇒ Total surface area of cylinder = 2 × 22 × 25

⇒ Total surface area of cylinder = 44 × 25

⇒ Total surface area of cylinder = 1100 cm²

Hence,

• Curved surface area of cylinder = 792 cm²
• Total surface area of cylinder = 1100 cm²

#answerwithquality

#BAL