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 radii of the spherical shell are 0.2 cm and 1.4 cm respectively. Find the outer curved surface area of the shell. | |||
| Right Option : C | |||
| View Explanation | |||
The inner and outer radii of the spherical shell are 3 cm and 7 cm respectively. Find the outer curved surface area of the spherical shell. | |||
| Right Option : A | |||
| 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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