A solid brass sphere of radius 2.1 dm is converted into a right circul – McqOptions

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1.	A solid brass sphere of radius 2.1 dm is converted into a right circular cylindrical rod of length 7cm. The ratio of total surface areas of the rod to the sphere is
A.	3 : 1
B.	1 : 3
C.	7 : 3
D.	3 : 7
Answer» D. 3 : 7

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