A solid sphere has a radius 21 cm. It is melted to form a cube. 20% ma – McqOptions

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1.	A solid sphere has a radius 21 cm. It is melted to form a cube. 20% material is wasted in this process. The cube is melted to form hemisphere. In thisÂ process 20% material is wasted. The hemisphere is melted to form two spheres of equal radius. 20% material was also wasted in this process. What is the radius (in cm) of each new sphere?
A.	4.2Â (23)
B.	2.1Â 23
C.	2.1Â 43
D.	4.2Â 43
Answer» C. 2.1Â 43

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