Question

Surface area of sphare​

Answer 1

Surface area of sphere is what referred to as Total surface area or lateral surface area because here the surface is curved everywhere.

$\large{ \boxed{ \rm{ \orange{Surface \: area \: of \: sphere = 4\pi {r}^{2} }}}}$

Total surface area of other 3-D shapes:

• Cuboid = 2(lb + bh + hl)
• Cube = 4s²
• Cylinder = 2πr(r + h)
• Cone = πr(l + r)
• Hemisphere = 3πr²

Lateral surface area of these shapes:

• Cuboid = 2h(l + b)
• Cube = 6s²
• Cylinder = 2πrh
• Cone = πrl
• Hemisphere = 2πr²

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