UPSKILL MATH PLUS

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1. Two identical solid hemispheres of equal base radius \(r cm\) are stuck together along their bases. The total surface area of the combination is \(6π r^2\).
 
2. A solid cylinder of radius \(r\) and height h is placed over other cylinder of same height and radius. The total surface area of the shape so formed is \(4π rh + 4π r^2\).