Question

Find the total surface area of this cylinder.
24cm
18cm

Answer 1

• 2262.8 cm²

Explanation:

We know that:

• Surface area of cylinder formula: 2πrh + 2πr²
• Height = 18 cm
• Diameter = 24 cm
• Radius = 12 cm

Solution:

• Surface area of cylinder = 2πrh + 2πr²
• => (2 x π x r x h) + (2 x π x r²)
• => (2 x 22/7 x 12 x 18) + (2 x 22/7 x 12²)
• => (44/7 x 12 x 18) + (44/7 x 144)
• => (44/7 x 216) + (44/7 x 144)
• => (1357.7) + (905.1)
• => 2262.8 cm² = Surface area of cylinder

Hence, the surface area of the cylinder is 2262.8 cm².