The diameters of external and internal surfaces of a hollow spherical shell are 10 cm and 6 cm respectively. If it is melted and recast into a solid cylinder of length of 223cm, find the diameter of the cylinder in cm
A
14
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B
16
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C
18
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D
20
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Solution
The correct option is A14
Let the radius of base of the cylinder be 'r'cm. So, Volume of meltallic solid cylinder of height 223cm(83cm)= Volume of metal in the spherical shell