Question: surface area of a sphere ( = 4 pi r ^ { 2 } ) , where ( r )

surface area of a sphere \(=4\pi r^{2}\), where \( r \) is the radius. The shape below is made from a larger hemisphere with a smaller hemisphere removed from its centre. Work out the surface area of the shape. Give your answer to 3 s.f.
surface area of a sphere \ ( = 4 \ pi r ^ { 2 } \

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