Question

How to find surface area of a cylinder, when radius is 60 cm and length is 400 cm​

Answer 1

Required Answer :

The surface area of the cylinder = 173,485.71 cm²

Given :

• Radius of the cylinder = 60 cm
• Length of the cylinder = 400 cm

To find :

• Surface area of the cylinder

Solution :

Here, we are given the radius and length of the cylinder and we need to calculate the surface area of the cylinder. So, we will use the following formula to calculate the surface area of the cylinder.

Formula to calculate the surface area of cylinder :-

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

where,

• Take π = 22/7
• r denotes the radius
• h denotes the height

we have,

• Radius (r) = 60 cm
• Height (h) = 400 cm

Substituting the given values :-

⇒ Surface area of cylinder = 2 × 22/7 × 60(400 + 60)

⇒ Surface area of cylinder = 2640/7(400 + 60)

⇒ Surface area of cylinder = 2640/7 × 460

⇒ Surface area of cylinder = 173,485.71

Therefore, the surface area of the cylinder = 173,485.71 cm²

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Some related formulae :-

• Volume of cylinder = πr²h
• Surface area of sphere = 4πr²
• Volume of cone = 1/3 πr²h
• Curved surface area of cone = πrl
• Total surface area of cone = πrl + πr²h
• Area of circle = πr²
• Circumference = 2πr
• Diameter = 2 × Radius
• Radius = Diameter/2