Surface Area of Spherical Shell
Surface Area of Spherical Shell
Spherical Shell: The difference of the two solid concentric spheres is called a Spherical Shell. A spherical shell has a finite thickness, which is the difference of the radii of the solid spheres which determine it.
Surface Area of Spherical Shell: If R and r are outer and inner radii of a hemispherical shell , then
Outer Surface Area =
Illustration: A hemispherical bowl is made of steel , 0.25 cm thick. The inner radius of the bowl is 5 cm. Find the outer curved Surface area of the bowl.
Solution: We have,
Inner Radius of the bowl = 5 cm
Thickness of steel = 0.25 cm
so, outer radius of the bowl = Inner Radius of the bowl + Thickness of steel
= 5 + 0.25
= 5.25 cm
So, outer curved Surface area of the bowl
The inner and outer radius of a spherical shell are 2 cm and 5 cm. Find the outer curved surface area of the spherical shell. | |||
| Right Option : B | |||
| View Explanation | |||
The inner and outer radii of a spherical shell are 5 cm and 14 cm respectively. Find the outer curved surface area. | |||
| Right Option : C | |||
| View Explanation | |||
A hemispherical bowl is made of steel , 1.25 cm thick. The inner radius of the bowl is 6 cm. Find the outer curved Surface area of the bowl. | |||
| Right Option : B | |||
| View Explanation | |||
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