Surface area of Sphere and Hemisphere

Find the ratio of the total surface area of a sphere and a hemisphere of same radius.

Find the ratio of the total surface area of a sphere and a hemisphere of same radius.

The ratio of the total surface area of a sphere and a hemisphere of same radius is 2:1 (b) 3:2 (c) 4:1 (d) 4:3

The ratio of the total surface area of a sphere and a hemisphere of same radius is 2:1 (b) 3:2 (c) 4:1 (d) 4:3

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Radius of hemisphere is twice that of a sphere. What is the ratio of total surface area of hemisphere and sphere ?

Surface area of a sphere is

Total surface area of a solid hemisphereis 675pisqcm .Find the curved surface area of the solid hemisphere.

The ratio of the surface area of a sphere and the curved surface area of the cylinder circumscribing the sphere is