There is a spherical ball whose diameter is 7 cm is melted and converted into a wire of diameter 10 mm .
a) What will be the length of wire .
b) If this wire is wounded around a cylindrical vessel of diameter 5 cm and overlap it properly . What will be the height of vessel and how many rounds will come around the vessel .
c) If this cylindercal vessel is 1 cm thick inside . Then what will be the mass of this vessel if density of vessel is 8 kg/cm before wounding a wire and after wounding wire .
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