We know that,We know that,Curved surface AREA of a hemisphere =2πr We know that,Curved surface area of a hemisphere =2πr 2We know that,Curved surface area of a hemisphere =2πr 2 We know that,Curved surface area of a hemisphere =2πr 2 So, when two solids hemispheres of same base radius are JOINED together ALONG their bases, thenWe know that,Curved surface area of a hemisphere =2πr 2 So, when two solids hemispheres of same base radius are joined together along their bases, thenCurved surface area of newly formed SOLID sphere=2×2πr We know that,Curved surface area of a hemisphere =2πr 2 So, when two solids hemispheres of same base radius are joined together along their bases, thenCurved surface area of newly formed solid sphere=2×2πr 2We know that,Curved surface area of a hemisphere =2πr 2 So, when two solids hemispheres of same base radius are joined together along their bases, thenCurved surface area of newly formed solid sphere=2×2πr 2 =4πr We know that,Curved surface area of a hemisphere =2πr 2 So, when two solids hemispheres of same base radius are joined together along their bases, thenCurved surface area of newly formed solid sphere=2×2πr 2 =4πr 2Explanation:Explanation: As two solid hemispheres of same base radius r are joined together along their bases then the new solid formed will be a sphere with the same radius r