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Surface Area of a Sphere Formula Derivation and Applications
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Q1. Derive the formula for the curved surface area of a sphere.
Q2. Find surface area of the sphere with radius of 20 cm.
Q3. Assume that Earth is a sphere of radius 6370 km.
a. Find the surface area of the Earth.
b. Ratio of land to water surface area of Earth is 3:1. Find the surface area of the land on the Earth
Q4. 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.
Q2. Find surface area of the sphere with radius of 20 cm.
Q3. Assume that Earth is a sphere of radius 6370 km.
a. Find the surface area of the Earth.
b. Ratio of land to water surface area of Earth is 3:1. Find the surface area of the land on the Earth
Q4. 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.
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